Dave,<div> You made a very point.</div><div><br></div><div>Thanks,</div><div>Sam<br><br>On Tuesday, March 16, 2021, Dave May <<a href="mailto:dave.mayhem23@gmail.com">dave.mayhem23@gmail.com</a>> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div dir="ltr"><br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, 16 Mar 2021 at 19:50, Sam Guo <<a href="mailto:sam.guo@cd-adapco.com" target="_blank">sam.guo@cd-adapco.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr">Dear PETSc dev team,<div> When there is an PETSc error, I go following overly verbose error message. Is it possible to get a simple error message like "Initial vector is zero or belongs to the deflection space"?</div><div><br></div></div></blockquote><div><br></div><div>When an error occurs and the execution is halted, a verbose and informative error message is shown.</div><div>I would argue this is useful (very useful), and should never ever be shortened or truncated.<br></div><div><br></div><div>This error thrown by PETSc gives you a stack trace. You can see where the error occurred, and the calling code which resulted in the error. In anything but a trivial code, this information is incredibly useful to isolate and fix the problem. I also think it's neat that you see the stack without having to even use a debugger.<br></div><div><br></div><div>Currently if your code does not produce errors, no message is displayed. <br></div><div>However, when an error occurs, a loud, long and informative message is displayed - and the code stops. <br></div><div>What is the use case which would cause / require you to change the current behaviour?</div><div><br></div><div>Thanks,</div><div>Dave<br></div><div><br></div><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div></div><div>Thanks,</div><div>Sam</div><div><br></div><div><pre bgcolor="#f4f5f7" style="white-space:pre-wrap;color:rgb(23,43,77);font-size:14px;background-color:rgb(244,245,247);border:1px solid rgb(223,225,230);border-radius:3px;line-height:20px;margin-top:10px;margin-bottom:0px;padding:6px 10px"><code bgcolor="#f4f5f7" style="border-radius:3px;line-height:20px;background-color:transparent;border:0px none;display:inline;margin:0px;padding:0px">[0]PETSC ERROR: --------------------- Error Message ------------------------------<wbr>------------------------------<wbr>--
[0]PETSC ERROR: Initial vector is zero or belongs to the deflation space
[0]PETSC ERROR: See <a href="http://www.mcs.anl.gov/petsc/documentation/faq.html" target="_blank">http://www.mcs.anl.gov/petsc/<wbr>documentation/faq.html</a> for trouble shooting.
[0]PETSC ERROR: Petsc Release Version 3.11.3, Jun, 26, 2019
[0]PETSC ERROR: Unknown Name on a arch-starccmplus_serial_real named <a href="http://pl2denbg0033pc.net.plm.eds.com/" target="_blank">pl2denbg0033pc.net.plm.eds.com</a> by cd3ppw Tue Mar 16 16:19:28 2021
[0]PETSC ERROR: Configure options --with-x=0 --with-fc=0 --with-debugging=0 --with-blaslapack-dir=/usr/<wbr>local/jenkins/dev1/mkl/2017.2-<wbr>cda-001/linux/lib/intel64/../.<wbr>. --with-mpi=0 -CFLAGS=-O3 -CXXFLAGS=-O3 --with-clean=1 --force --with-scalar-type=real
[0]PETSC ERROR: <a href="https://stash.cd-adapco.com/projects/UPS/repos/star/pull-requests/1" title="Feature/fixversion" style="color:rgb(0,82,204)" target="_blank">#1</a> EPSGetStartVector() line 806 in ../../../slepc/src/eps/<wbr>interface/epssolve.c
[0]PETSC ERROR: <a href="https://stash.cd-adapco.com/projects/UPS/repos/star/pull-requests/2" title="Feature/CCMP-69574/test unit facetree" style="color:rgb(0,82,204)" target="_blank">#2</a> EPSSolve_KrylovSchur_Default() line 259 in ../../../slepc/src/eps/impls/<wbr>krylov/krylovschur/<wbr>krylovschur.c
[0]PETSC ERROR: <a href="https://stash.cd-adapco.com/projects/UPS/repos/star/pull-requests/3" title="Feature/BDS-1490/table curve interpolation" style="color:rgb(0,82,204)" target="_blank">#3</a> EPSSolve() line 149 in ../../../slepc/src/eps/<wbr>interface/epssolve.c</code></pre></div></div>
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