Thanks for that. Regards Tarun From: Raffenetti, Ken <[email protected]> Sent: Monday, September 18, 2023 2:44 PM To: [email protected]; Thakur, Rajeev <[email protected]> Cc: Kumar, Tarun (DI SW ICS DVT RD QSCE) <[email protected]> Subject: Re: [mpich-discuss] Core dump in parse_args Hi Tarun, We did find that there is a hardcoded limit of ~1000 command line arguments. If you want a temporary workaround, you can increase the value of this define in the MPICH source to something larger: #define HYD_NUM_TMP_STRINGS 1000 I created https://github.com/pmodels/mpich/issues/6681 to track progress on a more robust fix. Ken From: "Raffenetti, Ken via discuss" <[email protected]<mailto:[email protected]>> Reply-To: "[email protected]<mailto:[email protected]>" <[email protected]<mailto:[email protected]>> Date: Monday, September 18, 2023 at 4:23 PM To: "[email protected]<mailto:[email protected]>" <[email protected]<mailto:[email protected]>>, "Thakur, Rajeev" <[email protected]<mailto:[email protected]>> Cc: "Raffenetti, Ken" <[email protected]<mailto:[email protected]>>, "[email protected]<mailto:[email protected]>" <[email protected]<mailto:[email protected]>> Subject: Re: [mpich-discuss] Core dump in parse_args I'm not aware of a hard-coded limit, but I am able to reproduce a segfault reliably by passing 1000 arguments a toy executable. Will update with more info when we have it. Ken From: "kumar.tarun--- via discuss" <[email protected]<mailto:[email protected]>> Reply-To: "[email protected]<mailto:[email protected]>" <[email protected]<mailto:[email protected]>> Date: Friday, September 15, 2023 at 4:57 PM To: "Thakur, Rajeev" <[email protected]<mailto:[email protected]>>, "[email protected]<mailto:[email protected]>" <[email protected]<mailto:[email protected]>> Cc: "[email protected]<mailto:[email protected]>" <[email protected]<mailto:[email protected]>> Subject: Re: [mpich-discuss] Core dump in parse_args Thanks Rajeev for your reply. I don't have the exact number as of now. It's definitely more than 1000. Is there a hard coded limit? Regards Tarun From: Thakur, Rajeev <[email protected]<mailto:[email protected]>> Sent: Friday, September 15, 2023 2:40 PM To: [email protected]<mailto:[email protected]> Cc: Kumar, Tarun (DI SW ICS DVT RD QSCE) <[email protected]<mailto:[email protected]>> Subject: Re: [mpich-discuss] Core dump in parse_args How many arguments? Rajeev From: "kumar.tarun--- via discuss" <[email protected]<mailto:[email protected]>> Reply-To: "[email protected]<mailto:[email protected]>" <[email protected]<mailto:[email protected]>> Date: Friday, September 15, 2023 at 4:22 PM To: "[email protected]<mailto:[email protected]>" <[email protected]<mailto:[email protected]>> Cc: "[email protected]<mailto:[email protected]>" <[email protected]<mailto:[email protected]>> Subject: [mpich-discuss] Core dump in parse_args Hi, I recently encountered this crash where mpiexec when executed from a bash script and with a large number of arguments crashes. The core dump is as follows: #0 0x0000000000408ec3 in parse_args () #1 0x0000000000409f26 in HYD_uii_mpx_get_parameters () #2 0x000000000040397a in main () If I reduce the number of arguments then I don't see the crash. Is it a known issue? Regards Tarun