<div dir="ltr">I am experiencing a very stubborn issue, apparently related to an MKL issue. I am solving a linear system using ksp which works well on windows. I am trying to port this program to Linux now but I have been getting an error coming from the solver (the matrix, right-hand side, and initial solution vectors have been constructed without any issues). However, when trying to compute the norm of any vector I get and error. Running the same program with the debug option on, I get the message shown below. I tried valgrind but did not help. Any suggestions?<div><br></div><div>Regards,</div><div><br></div><div>Adolfo<br><div><br></div><div><div style="margin:0px;padding:0px;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-stretch:inherit;font-size:14.6667px;line-height:inherit;font-family:Calibri;vertical-align:baseline;color:rgb(32,31,30)">[0]PETSC ERROR: ------------------------------------------------------------------------</div><div style="margin:0px;padding:0px;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-stretch:inherit;font-size:14.6667px;line-height:inherit;font-family:Calibri;vertical-align:baseline;color:rgb(32,31,30)">[0]PETSC ERROR: Caught signal number 11 SEGV: Segmentation Violation, probably memory access out of range</div><div style="margin:0px;padding:0px;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-stretch:inherit;font-size:14.6667px;line-height:inherit;font-family:Calibri;vertical-align:baseline;color:rgb(32,31,30)">[0]PETSC ERROR: Try option -start_in_debugger or -on_error_attach_debugger</div><div style="margin:0px;padding:0px;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-stretch:inherit;font-size:14.6667px;line-height:inherit;font-family:Calibri;vertical-align:baseline;color:rgb(32,31,30)">[0]PETSC ERROR: or see <a href="https://www.mcs.anl.gov/petsc/documentation/faq.html#valgrind" target="_blank" rel="noopener noreferrer" style="margin:0px;padding:0px;border:0px;font:inherit;vertical-align:baseline">https://www.mcs.anl.gov/petsc/documentation/faq.html#valgrind</a></div><div style="margin:0px;padding:0px;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-stretch:inherit;font-size:14.6667px;line-height:inherit;font-family:Calibri;vertical-align:baseline;color:rgb(32,31,30)">[0]PETSC ERROR: or try <a href="http://valgrind.org/" target="_blank" rel="noopener noreferrer" style="margin:0px;padding:0px;border:0px;font:inherit;vertical-align:baseline">http://valgrind.org</a> on GNU/linux and Apple Mac OS X to find memory corruption errors</div><div style="margin:0px;padding:0px;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-stretch:inherit;font-size:14.6667px;line-height:inherit;font-family:Calibri;vertical-align:baseline;color:rgb(32,31,30)">[0]PETSC ERROR: likely location of problem given in stack below</div><div style="margin:0px;padding:0px;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-stretch:inherit;font-size:14.6667px;line-height:inherit;font-family:Calibri;vertical-align:baseline;color:rgb(32,31,30)">[0]PETSC ERROR: ---------------------  Stack Frames ------------------------------------</div><div style="margin:0px;padding:0px;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-stretch:inherit;font-size:14.6667px;line-height:inherit;font-family:Calibri;vertical-align:baseline;color:rgb(32,31,30)">[0]PETSC ERROR: Note: The EXACT line numbers in the stack are not available,</div><div style="margin:0px;padding:0px;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-stretch:inherit;font-size:14.6667px;line-height:inherit;font-family:Calibri;vertical-align:baseline;color:rgb(32,31,30)">[0]PETSC ERROR:       INSTEAD the line number of the start of the function</div><div style="margin:0px;padding:0px;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-stretch:inherit;font-size:14.6667px;line-height:inherit;font-family:Calibri;vertical-align:baseline;color:rgb(32,31,30)">[0]PETSC ERROR:       is given.</div><div style="margin:0px;padding:0px;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-stretch:inherit;font-size:14.6667px;line-height:inherit;font-family:Calibri;vertical-align:baseline;color:rgb(32,31,30)">[0]PETSC ERROR: [0] BLASasum line 259 /home/rodriad/CODE/petsc-3.12.3/src/vec/vec/impls/seq/bvec2.c</div><div style="margin:0px;padding:0px;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-stretch:inherit;font-size:14.6667px;line-height:inherit;font-family:Calibri;vertical-align:baseline;color:rgb(32,31,30)">[0]PETSC ERROR: [0] VecNorm_Seq line 221 /home/rodriad/CODE/petsc-3.12.3/src/vec/vec/impls/seq/bvec2.c</div><div style="margin:0px;padding:0px;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-stretch:inherit;font-size:14.6667px;line-height:inherit;font-family:Calibri;vertical-align:baseline;color:rgb(32,31,30)">[0]PETSC ERROR: [0] VecNorm line 213 /home/rodriad/CODE/petsc-3.12.3/src/vec/vec/interface/rvector.c</div><div style="margin:0px;padding:0px;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-stretch:inherit;font-size:14.6667px;line-height:inherit;font-family:Calibri;vertical-align:baseline;color:rgb(32,31,30)">[0]PETSC ERROR: --------------------- Error Message --------------------------------------------------------------</div><div style="margin:0px;padding:0px;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-stretch:inherit;font-size:14.6667px;line-height:inherit;font-family:Calibri;vertical-align:baseline;color:rgb(32,31,30)">[0]PETSC ERROR: Signal received</div><div style="margin:0px;padding:0px;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-stretch:inherit;font-size:14.6667px;line-height:inherit;font-family:Calibri;vertical-align:baseline;color:rgb(32,31,30)">[0]PETSC ERROR: See <a href="https://www.mcs.anl.gov/petsc/documentation/faq.html" target="_blank" rel="noopener noreferrer" style="margin:0px;padding:0px;border:0px;font:inherit;vertical-align:baseline">https://www.mcs.anl.gov/petsc/documentation/faq.html</a> for trouble shooting.</div><div style="margin:0px;padding:0px;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-stretch:inherit;font-size:14.6667px;line-height:inherit;font-family:Calibri;vertical-align:baseline;color:rgb(32,31,30)">[0]PETSC ERROR: Petsc Release Version 3.12.3, Jan, 03, 2020</div><div style="margin:0px;padding:0px;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-stretch:inherit;font-size:14.6667px;line-height:inherit;font-family:Calibri;vertical-align:baseline;color:rgb(32,31,30)">[0]PETSC ERROR: Unknown Name on a arch-linux-oxy-dbg named ohylrss0 by rodriad Thu Mar  5 10:08:03 2020</div><div style="margin:0px;padding:0px;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-stretch:inherit;font-size:14.6667px;line-height:inherit;font-family:Calibri;vertical-align:baseline;color:rgb(32,31,30)">[0]PETSC ERROR: Configure options --with-debugging=yes --with-mpi-dir=/apps/Intel/XEcluster/compilers_and_libraries_2018.0.128/linux/mpi/intel64 COPTFLAGS=-debug CXXOPTFLAGS=-debug FOPTFLAGS=-debug PETSC_ARCH=arch-linux-oxy-dbg</div><div style="margin:0px;padding:0px;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-stretch:inherit;font-size:14.6667px;line-height:inherit;font-family:Calibri;vertical-align:baseline;color:rgb(32,31,30)">[0]PETSC ERROR: #1 User provided function() line 0 in  unknown file</div><div style="margin:0px;padding:0px;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-stretch:inherit;font-size:14.6667px;line-height:inherit;font-family:Calibri;vertical-align:baseline;color:rgb(32,31,30)">application called MPI_Abort(MPI_COMM_WORLD, 59) - process 0</div></div><div><br></div></div></div>