<p dir="ltr"><br>
Hi.<br></p>
<p dir="ltr">I am trying to solve an eigenvalue problem. I have a code that works for a particular input file. And, whenever I change the input file, the following error message appears. Any hint for debugging, please?<br></p>
<p dir="ltr">PETSC ERROR: ------------------------------------------------------------------------</p>
<p dir="ltr">[0]PETSC ERROR: Caught signal number 8 FPE: Floating Point Exception,probably divide by zero</p>
<p dir="ltr">[0]PETSC ERROR: Try option -start_in_debugger or -on_error_attach_debugger</p>
<p dir="ltr">[0]PETSC ERROR: or see<a href="http://www.mcs.anl.gov/petsc/documentation/faq.html#valgrind">http://www.mcs.anl.gov/petsc/documentation/faq.html#valgrind</a></p>
<p dir="ltr">[0]PETSC ERROR: or try <a href="http://valgrind.org/">http://valgrind.org</a> on GNU/linux and Apple Mac OS X to find memory corruption errors</p>
<p dir="ltr">[0]PETSC ERROR: likely location of problem given in stack below</p>
<p dir="ltr">[0]PETSC ERROR: --------------------- Stack Frames ------------------------------------</p>
<p dir="ltr">[0]PETSC ERROR: Note: The EXACT line numbers in the stack are not available,</p>
<p dir="ltr">[0]PETSC ERROR: INSTEAD the line number of the start of the function</p>
<p dir="ltr">[0]PETSC ERROR: is given.</p>
<p dir="ltr">[0]PETSC ERROR: [0] EPSGetConverged line 233 /home/soumya/slepc-3.6.0/src/eps/interface/epssolve.c</p>
<p dir="ltr">[0]PETSC ERROR: [0] EPSErrorView line 447 /home/soumya/slepc-3.6.0/src/eps/interface/epsview.c</p>
<p dir="ltr">[0]PETSC ERROR: [0] MatLUFactorSymbolic_SeqAIJ line 295 /home/soumya/petsc-3.6.1/src/mat/impls/aij/seq/aijfact.c</p>
<p dir="ltr">[0]PETSC ERROR: [0] MatLUFactorSymbolic line 2877 /home/soumya/petsc-3.6.1/src/mat/interface/matrix.c</p>
<p dir="ltr">[0]PETSC ERROR: [0] PCSetUp_LU line 99 /home/soumya/petsc-3.6.1/src/ksp/pc/impls/factor/lu/lu.c</p>
<p dir="ltr">[0]PETSC ERROR: [0] PCSetUp line 944 /home/soumya/petsc-3.6.1/src/ksp/pc/interface/precon.c</p>
<p dir="ltr">[0]PETSC ERROR: [0] KSPSetUp line 247 /home/soumya/petsc-3.6.1/src/ksp/ksp/interface/itfunc.c</p>
<p dir="ltr">[0]PETSC ERROR: [0] STSetUp_Cayley line 161 /home/soumya/slepc-3.6.0/src/sys/classes/st/impls/cayley/cayley.c</p>
<p dir="ltr">[0]PETSC ERROR: [0] STSetUp line 273 /home/soumya/slepc-3.6.0/src/sys/classes/st/interface/stsolve.c</p>
<p dir="ltr">[0]PETSC ERROR: [0] EPSSetUp line 58 /home/soumya/slepc-3.6.0/src/eps/interface/epssetup.c</p>
<p dir="ltr">[0]PETSC ERROR: [0] EPSSolve line 83 /home/soumya/slepc-3.6.0/src/eps/interface/epssolve.c</p>
<p dir="ltr">[0]PETSC ERROR: --------------------- Error Message --------------------------------------------------------------</p>
<p dir="ltr">[0]PETSC ERROR: Signal received</p>
<p dir="ltr">[0]PETSC ERROR: See<a href="http://www.mcs.anl.gov/petsc/documentation/faq.html">http://www.mcs.anl.gov/petsc/documentation/faq.html</a> for trouble shooting.</p>
<p dir="ltr">[0]PETSC ERROR: Petsc Release Version 3.6.1, Jul, 22, 2015 </p>
<p dir="ltr">[0]PETSC ERROR: ./main on a arch-linux2-cxx-debug named soumya-OptiPlex-9010 by soumya Mon Sep 21 21:36:29 2015</p>
<p dir="ltr">[0]PETSC ERROR: Configure options --with-cc=gcc --with-fc=gfortran --with-cxx=g++ --with-clanguage=cxx --download-fblaslapack --download-mpich --with-scalar-type=complex</p>
<p dir="ltr">[0]PETSC ERROR: #12 User provided function() line 0 in unknown file</p>
<p dir="ltr">application called MPI_Abort(MPI_COMM_WORLD, 59) - process 0</p>
<p dir="ltr">[unset]: aborting job:</p>
<p dir="ltr">application called MPI_Abort(MPI_COMM<br></p>
<p dir="ltr">Thanks,</p>