<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body style="overflow-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;"><div><br></div> When running with just one mpi process it is often possible (on non-batch systems where one does not need to use mpiexec to start up a single rank run) to continue to just use<div><br></div><div><blockquote type="cite"><div style="margin: 0px;"><span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt;">gdb <the name of my exe.file> </span></div></blockquote><div><br></div>when running with more than 1 MPI process (or if the execuable requires mpiexec to start) you can use</div><div><br></div><div>mpiexec -n 2 ./executable options -start_in_debugger </div><div><br></div><div>and it will open two terminals with the debugger for each rank. See <a href="https://petsc.org/release/manual/other/#sec-debugging">https://petsc.org/release/manual/other/#sec-debugging</a> for more details.</div><div><br></div><div><br><div><br><blockquote type="cite"><div>On Jan 10, 2024, at 3:38 PM, Shatanawi, Sawsan Muhammad via petsc-users <petsc-users@mcs.anl.gov> wrote:</div><br class="Apple-interchange-newline"><div><meta charset="UTF-8"><div style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 18px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;"><span class="elementToProof" style="letter-spacing: normal; font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; font-weight: 400;">Hello all,</span></div><div style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 18px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; text-align: left; margin: 0px;"><span style="letter-spacing: normal; font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; font-weight: 400;"><br></span></div><div style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 18px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; text-align: left; margin: 0px;"><span style="letter-spacing: normal; font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; font-weight: 400;">I hope you are doing well.</span></div><div style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 18px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; text-align: left; margin: 0px;"><span style="letter-spacing: normal; font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; font-weight: 400;"><br></span></div><div style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 18px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; text-align: left; margin: 0px;"><span style="letter-spacing: normal; font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; font-weight: 400;">Generally, I use gdb <the name of my exe.file> to debug the code.</span></div><div style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 18px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; text-align: left; margin: 0px;"><span style="letter-spacing: normal; font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; font-weight: 400;"> I got the attached error message.</span></div><div style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 18px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; text-align: left; margin: 0px;"><span style="letter-spacing: normal; font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; font-weight: 400;"><br></span></div><div style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 18px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; text-align: left; margin: 0px;"><span style="letter-spacing: normal; font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; font-weight: 400;">I have tried to add the flag -start_in_debugger in the make file, but it didn't work, so it seems I was doing it in the wrong way</span></div><div style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 18px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; text-align: left; margin: 0px;"><span style="letter-spacing: normal; font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; font-weight: 400;"><br></span></div><div style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 18px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; text-align: left; margin: 0px;"><span style="letter-spacing: normal; font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; font-weight: 400;">This is the link for the whole code: <a href="https://github.com/sshatanawi/SS_GWM" id="OWA37645568-445c-55da-2f91-abc541b1f4d6" class="OWAAutoLink" data-loopstyle="linkonly" style="margin: 0px;">sshatanawi/SS_GWM (github.com)</a></span></div><div class="_Entity _EType_OWALinkPreview _EId_OWALinkPreview _EReadonly_1" style="caret-color: rgb(0, 0, 0); font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; font-size: medium; font-family: "Segoe UI Web (West European)", "Segoe UI", -apple-system, BlinkMacSystemFont, Roboto, "Helvetica Neue", sans-serif; margin: 0px; orphans: 2; widows: 2;"><div id="LPBorder_GTaHR0cHM6Ly9naXRodWIuY29tL3NzaGF0YW5hd2kvU1NfR1dN" class="LPBorder867037" style="margin: 16px 0px; max-width: 800px; min-width: 424px; position: relative;"><table id="LPContainer867037" style="padding: 12px 36px 12px 12px; width: 600px; border-width: 1px; border-style: solid; border-color: rgb(200, 200, 200); border-radius: 2px;"><tbody><tr valign="top" style="border-spacing: 0px;"><td><div id="LPImageContainer867037" style="margin: 0px 12px 0px 0px; height: 120px; overflow: hidden; position: relative;"><a target="_blank" id="LPImageAnchor867037" href="https://github.com/sshatanawi/SS_GWM" style="margin: 0px;"><img id="LPThumbnailImageId867037" alt="" height="120" width="240" src="https://opengraph.githubassets.com/9eb6cd14baf12f04848ed209b6f502415eb531bdd7b3a5f9696af68663b870c0/sshatanawi/SS_GWM" style="margin: 0px; display: block;"></a></div></td><td style="width: 289.6px;"><div id="LPTitle867037" style="font-weight: 300; font-size: 21px; font-family: wf_segoe-ui_light, "Segoe UI Light", "Segoe WP Light", "Segoe UI", "Segoe WP", Tahoma, Arial, sans-serif; margin: 0px 8px 12px 0px;"><a target="_blank" id="LPUrlAnchor867037" href="https://github.com/sshatanawi/SS_GWM" style="margin: 0px; text-decoration: none;">GitHub - sshatanawi/SS_GWM</a></div><div id="LPDescription867037" style="font-size: 14px; font-family: wf_segoe-ui_normal, "Segoe UI", "Segoe WP", Tahoma, Arial, sans-serif; margin: 0px 8px 12px 0px; max-height: 100px; overflow: hidden; color: rgb(102, 102, 102);">Contribute to sshatanawi/SS_GWM development by creating an account on GitHub.</div><div id="LPMetadata867037" style="font-size: 14px; font-family: wf_segoe-ui_normal, "Segoe UI", "Segoe WP", Tahoma, Arial, sans-serif; margin: 0px; color: rgb(166, 166, 166);"><a href="http://github.com/">github.com</a></div></td></tr></tbody></table><div id="LPCloseButtonContainer867037" class="uHkAz" tabindex="0" title="Remove link preview" role="button"><i data-icon-name="Cancel" aria-hidden="true" id="LPCloseButton867037" class="Rm9Q1 root-662"></i></div></div></div><div style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 18px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; text-align: left; margin: 0px;"><span style="letter-spacing: normal; font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; font-weight: 400;"><br></span></div><div class="elementToProof" style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 18px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; text-align: left; margin: 0px;"><span style="letter-spacing: normal; font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; font-weight: 400;">You can read the description of the code in " </span><span style="letter-spacing: normal; font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; font-weight: 400; color: rgb(12, 100, 192);">Model Desprciption.pdf</span><span style="letter-spacing: normal; font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; font-weight: 400;">"</span></div><div style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 18px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; text-align: left; margin: 0px;"><span style="letter-spacing: normal; font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; font-weight: 400;">the compiling file is </span><span style="letter-spacing: normal; font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; font-weight: 400; color: rgb(12, 100, 192);">makefile_f90</span><span style="letter-spacing: normal; font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; font-weight: 400;"> where you can find the linked code files</span></div><div style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 18px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; text-align: left; margin: 0px;"><span style="letter-spacing: normal; font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; font-weight: 400;"><br></span></div><div style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 18px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; text-align: left; margin: 0px;"><span class="elementToProof" style="letter-spacing: normal; font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; font-weight: 400;">I really appreciate your help<br><br>Bests,<br>Sawsan</span></div><div id="appendonsend" style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 18px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;"></div><hr tabindex="-1" style="font-family: Helvetica; font-size: 18px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline-block; width: 934.90625px;"><span style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 18px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;"></span><div id="divRplyFwdMsg" dir="ltr" style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 18px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;"><font face="Calibri, sans-serif" style="font-size: 11pt;"><b>From:</b><span class="Apple-converted-space"> </span>Mark Adams <<a href="mailto:mfadams@lbl.gov">mfadams@lbl.gov</a>><br><b>Sent:</b><span class="Apple-converted-space"> </span>Friday, January 5, 2024 4:53 AM<br><b>To:</b><span class="Apple-converted-space"> </span>Shatanawi, Sawsan Muhammad <<a href="mailto:sawsan.shatanawi@wsu.edu">sawsan.shatanawi@wsu.edu</a>><br><b>Cc:</b><span class="Apple-converted-space"> </span>Matthew Knepley <<a href="mailto:knepley@gmail.com">knepley@gmail.com</a>>;<span class="Apple-converted-space"> </span><a href="mailto:petsc-users@mcs.anl.gov">petsc-users@mcs.anl.gov</a><span class="Apple-converted-space"> </span><<a href="mailto:petsc-users@mcs.anl.gov">petsc-users@mcs.anl.gov</a>><br><b>Subject:</b><span class="Apple-converted-space"> </span>Re: [petsc-users] Help with Integrating PETSc into Fortran Groundwater Flow Simulation Code</font><div> </div></div><div style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 18px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;"><div style="margin-top: 0px; margin-bottom: 0px; border: 1px solid rgb(255, 202, 202); background-color: rgb(255, 235, 156); padding: 1px;"><span style="font-size: 10pt;"><b>[EXTERNAL EMAIL]</b></span></div><div><div dir="ltr">This is a segv. As Matt said, you need to use a debugger for this or add print statements to narrow down the place where this happens.<div><br></div><div>You will need to learn how to use debuggers to do your project so you might as well start now.</div><div><br></div><div>If you have a machine with a GUI debugger that is easier but command line debuggers are good to learn anyway.</div><div><br></div><div>I tend to run debuggers directly (eg, lldb ./a.out -- program-args ...) and use a GUI debugger (eg, Totalview or DDT) if available.</div><div><br></div><div>Mark</div><div><br></div></div><br><div class="x_gmail_quote"><div dir="ltr" class="x_gmail_attr">On Wed, Dec 20, 2023 at 10:02 PM Shatanawi, Sawsan Muhammad via petsc-users <<a href="mailto:petsc-users@mcs.anl.gov">petsc-users@mcs.anl.gov</a>> wrote:<br></div><blockquote class="x_gmail_quote" style="margin: 0px 0px 0px 0.8ex; border-left-width: 1px; border-left-style: solid; border-left-color: rgb(204, 204, 204); padding-left: 1ex;"><div class="x_msg1291163558337743399"><div dir="ltr"><div style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt;">Hello Matthew,<br><br>Thank you for your help. I am sorry that I keep coming back with my error messages, but I reached a point that I don't know how to fix them, and I don't understand them easily.<br>The list of errors is getting shorter, now I am getting the attached error messages </div><div style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt;"><br></div><div style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt;">Thank you again,<br><br></div><div style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt;">Sawsan</div><div id="x_m_1291163558337743399appendonsend"></div><hr style="display: inline-block; width: 917.34375px;"><div id="x_m_1291163558337743399divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size: 11pt;"><b>From:</b><span class="Apple-converted-space"> </span>Matthew Knepley <<a href="mailto:knepley@gmail.com" target="_blank">knepley@gmail.com</a>><br><b>Sent:</b><span class="Apple-converted-space"> </span>Wednesday, December 20, 2023 6:54 PM<br><b>To:</b><span class="Apple-converted-space"> </span>Shatanawi, Sawsan Muhammad <<a href="mailto:sawsan.shatanawi@wsu.edu" target="_blank">sawsan.shatanawi@wsu.edu</a>><br><b>Cc:</b><span class="Apple-converted-space"> </span>Barry Smith <<a href="mailto:bsmith@petsc.dev" target="_blank">bsmith@petsc.dev</a>>;<span class="Apple-converted-space"> </span><a href="mailto:petsc-users@mcs.anl.gov" target="_blank">petsc-users@mcs.anl.gov</a><span class="Apple-converted-space"> </span><<a href="mailto:petsc-users@mcs.anl.gov" target="_blank">petsc-users@mcs.anl.gov</a>><br><b>Subject:</b><span class="Apple-converted-space"> </span>Re: [petsc-users] Help with Integrating PETSc into Fortran Groundwater Flow Simulation Code</font><div> </div></div><div><div style="margin-top: 0px; margin-bottom: 0px; border: 1px solid rgb(255, 202, 202); background-color: rgb(255, 235, 156); padding: 1px;"><span style="font-size: 10pt;"><b>[EXTERNAL EMAIL]</b></span></div><div><div dir="ltr"><div dir="ltr">On Wed, Dec 20, 2023 at 9:49 PM Shatanawi, Sawsan Muhammad via petsc-users <<a href="mailto:petsc-users@mcs.anl.gov" target="_blank">petsc-users@mcs.anl.gov</a>> wrote:<br></div><div><blockquote style="margin: 0px 0px 0px 0.8ex; border-left-width: 1px; border-left-style: solid; border-left-color: rgb(204, 204, 204); padding-left: 1ex;"><div><div dir="ltr"><div style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt;"><span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif;">Hello Barry,<br><br>Thank you a lot for your help, Now I am getting the attached error message.</span></div></div></div></blockquote><div><br></div><div>Do not destroy the PC from KSPGetPC()</div><div><br></div><div> THanks,</div><div><br></div><div> Matt</div><div> </div><blockquote style="margin: 0px 0px 0px 0.8ex; border-left-width: 1px; border-left-style: solid; border-left-color: rgb(204, 204, 204); padding-left: 1ex;"><div><div dir="ltr"><div style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt;"><span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif;">Bests,<br>Sawsan</span></div><div id="x_m_1291163558337743399x_m_6596943672973964543appendonsend"></div><hr style="display: inline-block; width: 899.78125px;"><div id="x_m_1291163558337743399x_m_6596943672973964543divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size: 11pt;"><b>From:</b><span class="Apple-converted-space"> </span>Barry Smith <<a href="mailto:bsmith@petsc.dev" target="_blank">bsmith@petsc.dev</a>><br><b>Sent:</b><span class="Apple-converted-space"> </span>Wednesday, December 20, 2023 6:32 PM<br><b>To:</b><span class="Apple-converted-space"> </span>Shatanawi, Sawsan Muhammad <<a href="mailto:sawsan.shatanawi@wsu.edu" target="_blank">sawsan.shatanawi@wsu.edu</a>><br><b>Cc:</b><span class="Apple-converted-space"> </span>Mark Adams <<a href="mailto:mfadams@lbl.gov" target="_blank">mfadams@lbl.gov</a>>;<span class="Apple-converted-space"> </span><a href="mailto:petsc-users@mcs.anl.gov" target="_blank">petsc-users@mcs.anl.gov</a><span class="Apple-converted-space"> </span><<a href="mailto:petsc-users@mcs.anl.gov" target="_blank">petsc-users@mcs.anl.gov</a>><br><b>Subject:</b><span class="Apple-converted-space"> </span>Re: [petsc-users] Help with Integrating PETSc into Fortran Groundwater Flow Simulation Code</font><div> </div></div><div><div style="margin-top: 0px; margin-bottom: 0px; border: 1px solid rgb(255, 202, 202); background-color: rgb(255, 235, 156); padding: 1px;"><span style="font-size: 10pt;"><b>[EXTERNAL EMAIL]</b></span></div><div><div><br></div>Instead of <div><br></div><div><div> call PCCreate(PETSC_COMM_WORLD, pc, ierr)</div><div> call PCSetType(pc, PCILU,ierr) ! Choose a preconditioner type (ILU)</div><div> call KSPSetPC(ksp, pc,ierr) ! Associate the preconditioner with the KSP solver</div><div><br></div><div>do</div><div><br></div><div> call KSPGetPC(ksp,pc,ierr)</div><div> call PCSetType(pc, PCILU,ierr)</div><div><br></div><div>Do not call KSPSetUp(). It will be taken care of automatically during the solve</div><div><br></div><div><br></div><div><div><br><blockquote type="cite"><div>On Dec 20, 2023, at 8:52 PM, Shatanawi, Sawsan Muhammad via petsc-users <<a href="mailto:petsc-users@mcs.anl.gov" target="_blank">petsc-users@mcs.anl.gov</a>> wrote:</div><br><div><div style="font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; text-decoration: none; font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt;">Hello, <br>I don't think that I set preallocation values when I created the matrix, would you please have look at my code. It is just the petsc related part from my code.<br>I was able to fix some of the error messages. Now I have a new set of error messages related to the KSP solver (attached)<br><br>I appreciate your help</div><div style="font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; text-decoration: none; font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt;"><br></div><div style="font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; text-decoration: none; font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt;">Sawsan</div><div id="x_m_1291163558337743399x_m_6596943672973964543x_appendonsend" style="font-family: Helvetica; font-size: 18px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; text-decoration: none;"></div><hr style="font-family: Helvetica; font-size: 18px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; text-decoration: none; display: inline-block; width: 934.906px;"><span style="font-family: Helvetica; font-size: 18px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; text-decoration: none; float: none; display: inline;"></span><div id="x_m_1291163558337743399x_m_6596943672973964543x_divRplyFwdMsg" dir="ltr" style="font-family: Helvetica; font-size: 18px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; text-decoration: none;"><font face="Calibri, sans-serif" style="font-size: 11pt;"><b>From:</b><span> </span>Mark Adams <<a href="mailto:mfadams@lbl.gov" target="_blank">mfadams@lbl.gov</a>><br><b>Sent:</b><span> </span>Wednesday, December 20, 2023 6:44 AM<br><b>To:</b><span> </span>Shatanawi, Sawsan Muhammad <<a href="mailto:sawsan.shatanawi@wsu.edu" target="_blank">sawsan.shatanawi@wsu.edu</a>><br><b>Cc:</b><span> </span><a href="mailto:petsc-users@mcs.anl.gov" target="_blank">petsc-users@mcs.anl.gov</a><span> </span><<a href="mailto:petsc-users@mcs.anl.gov" target="_blank">petsc-users@mcs.anl.gov</a>><br><b>Subject:</b><span> </span>Re: [petsc-users] Help with Integrating PETSc into Fortran Groundwater Flow Simulation Code</font><div> </div></div><div style="font-family: Helvetica; font-size: 18px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; text-decoration: none;"><div style="margin-top: 0px; margin-bottom: 0px; border: 1px solid rgb(255, 202, 202); background-color: rgb(255, 235, 156); padding: 1px;"><span style="font-size: 10pt;"><b>[EXTERNAL EMAIL]</b></span></div><div><div dir="ltr">Did you set preallocation values when you created the matrix?<div>Don't do that.</div></div><br><div><div dir="ltr">On Wed, Dec 20, 2023 at 9:36 AM Shatanawi, Sawsan Muhammad <<a href="mailto:sawsan.shatanawi@wsu.edu" target="_blank">sawsan.shatanawi@wsu.edu</a>> wrote:<br></div><blockquote style="margin: 0px 0px 0px 0.8ex; border-left-width: 1px; border-left-style: solid; border-left-color: rgb(204, 204, 204); padding-left: 1ex;"><div><div dir="ltr"><div dir="ltr">Hello, </div><div dir="ltr"><br></div><div dir="ltr">I am trying to create a sparse matrix( which is as I believe a zero matrix) then adding some nonzero elements to it over a loop, then assembling it </div><div id="x_m_1291163558337743399x_m_6596943672973964543x_x_m_-677654408871201876ms-outlook-mobile-signature"><div><br></div>Get<span> </span><a href="https://urldefense.com/v3/__https://aka.ms/o0ukef__;!!JmPEgBY0HMszNaDT!uUJ_jeYf45gcXDGR_PeMjhU7hbd_fKcXJPn0pM9eb-YQihKNYuXMYM9x-hglsbXsCFIwNBWgHXdetHODupsOloE$" originalsrc="https://urldefense.com/v3/__https://aka.ms/o0ukef__;!!JmPEgBY0HMszNaDT!uUJ_jeYf45gcXDGR_PeMjhU7hbd_fKcXJPn0pM9eb-YQihKNYuXMYM9x-hglsbXsCFIwNBWgHXdetHODupsOloE$" shash="Uyo9e/pZ0FjL9jxhJDn8iU52r6SqPQgu79YugNAhzwAIcCJ8pmfAzetNKcgETiHHMxT/btaJpwAuciCVRKIoMZKczon79xTLWvUi0GcHSCWY3v1ycQYfEAKHkX+uxMsbMigJxq1WNMUB8m8aJGMO6H6BCUKpym6yaESXFxpyRUg=" target="_blank">Outlook for iOS</a></div><div id="x_m_1291163558337743399x_m_6596943672973964543x_x_m_-677654408871201876mail-editor-reference-message-container"><hr style="display: inline-block; width: 917.344px;"><div id="x_m_1291163558337743399x_m_6596943672973964543x_x_m_-677654408871201876divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif"><b>From:</b><span> </span>Mark Adams <<a href="mailto:mfadams@lbl.gov" target="_blank">mfadams@lbl.gov</a>><br><b>Sent:</b><span> </span>Wednesday, December 20, 2023 2:48 AM<br><b>To:</b><span> </span>Shatanawi, Sawsan Muhammad <<a href="mailto:sawsan.shatanawi@wsu.edu" target="_blank">sawsan.shatanawi@wsu.edu</a>><br><b>Cc:</b><span> </span><a href="mailto:petsc-users@mcs.anl.gov" target="_blank">petsc-users@mcs.anl.gov</a><span> </span><<a href="mailto:petsc-users@mcs.anl.gov" target="_blank">petsc-users@mcs.anl.gov</a>><br><b>Subject:</b><span> </span>Re: [petsc-users] Help with Integrating PETSc into Fortran Groundwater Flow Simulation Code<div> </div></font></div><div style="margin-top: 0px; margin-bottom: 0px; border: 1px solid rgb(255, 202, 202); padding: 1px; background-color: rgb(255, 235, 156);"><span style="font-size: 10pt;"><b>[EXTERNAL EMAIL]</b></span></div><div><div dir="ltr">I am guessing that you are creating a matrix, adding to it, finalizing it ("assembly"), and then adding to it again, which is fine, but you are adding new non-zeros to the sparsity pattern.<div>If this is what you want then you can tell the matrix to let you do that.</div><div>Otherwise you have a bug.</div><div><br></div><div>Mark</div></div><br><div><div dir="ltr">On Tue, Dec 19, 2023 at 9:50 PM Shatanawi, Sawsan Muhammad via petsc-users <<a href="mailto:petsc-users@mcs.anl.gov" target="_blank">petsc-users@mcs.anl.gov</a>> wrote:<br></div><blockquote style="margin: 0px 0px 0px 0.8ex; border-left-width: 1px; border-left-style: solid; border-left-color: rgb(204, 204, 204); padding-left: 1ex;"><div><div dir="ltr"><div style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt;"></div>Hello everyone,<div><br></div><div>I hope this email finds you well.</div><div><span><br></span></div><div><span> My Name is Sawsan Shatanawi,</span><span><span style="display: inline; color: rgb(55, 65, 81);"> and I am currently working on developing a Fortran code for simulating groundwater flow in a 3D system. The code involves solving a nonlinear system, and I have created the matrix to be solved using the PCG solver and Picard iteration. However, </span></span><span>when I tried to assign it as a PETSc matrix I started getting a lot of error messages.</span></div><div><br></div><div>I am kindly asking if someone can help me,<span style="display: inline; color: rgb(55, 65, 81);"> I would be happy to share my code with him/her.</span></div><div><span><br></span></div><div><span>Please find the attached file contains a list of errors I have gotten</span></div><div><span style="color: rgb(55, 65, 81);"><br></span></div><div><span style="color: rgb(55, 65, 81);">Thank you in advance for your time and assistance.</span><br></div><div><span><p style="margin: 1.25em 0px; border: 0px solid rgb(217, 217, 227); box-sizing: border-box; color: rgb(55, 65, 81);">Best regards,</p><p style="margin: 1.25em 0px; border: 0px solid rgb(217, 217, 227); box-sizing: border-box; color: rgb(55, 65, 81);"> Sawsan</p><br></span></div><div style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt;"></div></div></div></blockquote></div></div></div></div></div></blockquote></div></div></div><span id="x_m_1291163558337743399x_m_6596943672973964543x_cid:66357E60-6F0B-4E28-9883-5421A4F75577"><Matrix_RHS.F90></span><span id="x_m_1291163558337743399x_m_6596943672973964543x_cid:FB95EDCC-3170-4E85-BBFB-5804756A9022"><out.txt></span><span id="x_m_1291163558337743399x_m_6596943672973964543x_cid:8AF6D377-8CA5-4FFF-81AC-12EFB1837766"><solver.F90></span></div></blockquote></div><br></div></div></div></div></div></div></blockquote></div><br clear="all"><div><br></div><span>--<span class="Apple-converted-space"> </span></span><br><div dir="ltr"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div>What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments lead.<br>-- Norbert Wiener</div><div><br></div><div><a href="https://urldefense.com/v3/__http://www.cse.buffalo.edu/*knepley/__;fg!!JmPEgBY0HMszNaDT!uskvAyF0pMMWDbMIexr9g4qN46V7Rea17GQdNIVG2vH_HMaX7mXgie4ZYgusmPpss_DS7H1_8vn8arGQNSkC$" originalsrc="https://urldefense.com/v3/__http://www.cse.buffalo.edu/*knepley/__;fg!!JmPEgBY0HMszNaDT!uskvAyF0pMMWDbMIexr9g4qN46V7Rea17GQdNIVG2vH_HMaX7mXgie4ZYgusmPpss_DS7H1_8vn8arGQNSkC$" shash="guXSIdq67EmUSC7b9XNcrRUc776vSd1B/gFoh96WZ79UyCbdokRl7dFT8UNnRLVZ1VgjvqV1VPjjW7GWoyQcq+Z+Aas6PedXbjLPAlPEZzhhUFWeMc7f8VTJ8rlQkw0/hEnJc4z7kPDt94g6K5Pmcro8qfzeHb1sPdNVdeBkeAo=" target="_blank">https://www.cse.buffalo.edu/~knepley/</a><br></div></div></div></div></div></div></div></div></div></div></div></div></blockquote></div></div></div><span id="cid:581943C0-7E18-40C2-A69E-456DB0817169"><out4.txt></span></div></blockquote></div><br></div></body></html>