https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/PARDISO-crashes-with-access-violation-in-case-of-OpenMP-parallel/m-p/1747510#M37580 <P>Dear Fengrui,&nbsp;<BR />I've checked the issue, it works now properly. You can close the thread, thank you!</P> Mon, 11 May 2026 11:03:02 GMT BZoltan 2026-05-11T11:03:02Z https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/PARDISO-crashes-with-access-violation-in-case-of-OpenMP-parallel/m-p/1723838#M37402 <P>Currently we are using Intel Fortran Compiler IFX 2025.2.1, however the crash happens with older and the newer (2025.3) versions as well.<BR />We would like to solve sparse matrix equations with pardiso. We reproduced the crash with several Intel and AMD processors and on win10 and win11 as well.</P><P>The crash happens only if Iparm(2)=3 (parallel METIS reordering).<BR />With Iparm(2)=2 there is no problem (METIS reordering).</P><P>Problem statement:</P><P>If we try to solve a sparse matrix with the above mentioned Iparm(2)=3 reordering type, pardiso sometimes crashes with the attached access violation.<BR />We figured out the crash only happens if the processor usage is high from another process as well next to the actual program.</P><P>The parallel running high CPU usage program can be arbitrary. The crash can be reproduced with running several programs which call pardiso separately,<BR />but the program running in parallel does not necessarily have to be the pardiso, it can be a random program.</P><P><BR />This is how we reproduced the problem constantly:</P><P>In a batch file we run 20 separate exe-s with one equation solver separately one-by-one.<BR />The 20 different exe run the pardiso solver separately. Some of the programs return with correct solution,<BR />some of them returns with a valid error code that there is insufficient memory (which is a totally valid returning error code).<BR />But some of the exe-s crash and show acces violation (see attached pic).</P><P>With the mentioned conditions (with arbitrary parallel running high CPU usage program) only one pardiso program could crash with the same access violation as well.</P><P>We attached the main program but the sparse matrix input files are too large to be attached. The crash can be reproduced by relatively large matrices but not by only a specific matrix.<BR />If there is a way to attach the complete inputs (ca. 800 MB) please let us know. How can we avoid the random crash with Iparm(2)=3 reordering mode?</P><P>Thanks</P> Tue, 28 Oct 2025 08:41:13 GMT https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/PARDISO-crashes-with-access-violation-in-case-of-OpenMP-parallel/m-p/1723838#M37402 BZoltan 2025-10-28T08:41:13Z https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/PARDISO-crashes-with-access-violation-in-case-of-OpenMP-parallel/m-p/1747311#M37572 <P>Hi,</P> <P>&nbsp;</P> <P>This issue has been fixed in the latest 2026.0 release. Please verify.</P> <P>&nbsp;</P> <P>Thanks,</P> <P>Fengrui</P> Fri, 08 May 2026 18:22:30 GMT https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/PARDISO-crashes-with-access-violation-in-case-of-OpenMP-parallel/m-p/1747311#M37572 Fengrui 2026-05-08T18:22:30Z https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/PARDISO-crashes-with-access-violation-in-case-of-OpenMP-parallel/m-p/1747510#M37580 <P>Dear Fengrui,&nbsp;<BR />I've checked the issue, it works now properly. You can close the thread, thank you!</P> Mon, 11 May 2026 11:03:02 GMT https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/PARDISO-crashes-with-access-violation-in-case-of-OpenMP-parallel/m-p/1747510#M37580 BZoltan 2026-05-11T11:03:02Z https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/PARDISO-crashes-with-access-violation-in-case-of-OpenMP-parallel/m-p/1747534#M37583 <P>Great! Thank you again for reporting this issue.</P> Mon, 11 May 2026 14:26:49 GMT https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/PARDISO-crashes-with-access-violation-in-case-of-OpenMP-parallel/m-p/1747534#M37583 Fengrui 2026-05-11T14:26:49Z