Windows long path support in mpiexec?

[ASTTools]

Hi,

I have an issue where our MPI solver stops right at the start when the project directory length exceeds 260 characters:

[mpiexec@ATGRZWN312535] HYD_hostfile_parse (hostfile\hydra_hostfile.c:74): machinefile no such file, or not a regular file
[mpiexec@ATGRZWN312535] mfile_fn (mpiexec_params.c:489): error parsing hostfile
[mpiexec@ATGRZWN312535] match_arg (arg\hydra_arg.c:83): match handler returned error
[mpiexec@ATGRZWN312535] HYD_arg_parse_array (arg\hydra_arg.c:128): argument matching returned error
[mpiexec@ATGRZWN312535] mpiexec_get_parameters (mpiexec_params.c:1359): error parsing input array
[mpiexec@ATGRZWN312535] wmain (mpiexec.c:1783): error parsing parameters

The machine file exists and the simulation starts correctly when the project path is shorter.

Is mpiexec not supporting or Windows long paths or do you have different hint what could be the problem?

Thanks,

BR

Armin

[VeenaJ_Intel]

Hi,

Thank you for reaching out to the Intel Communities. To assist you effectively, we kindly request the following details:

• Intel MPI Version that you are currently using. 
• MPI Solver you are using
• Simulation Software: Please mention the simulation software that is being used in conjunction with Intel MPI and the MPI solver.
• Visual Studio Version: If you are utilizing Visual Studio for your work, kindly provide the exact version and sub-version (e.g., Visual Studio 2019, Visual Studio 2022).
• Operating System Version 
• CPU and Hardware Details
• Reproducer Code
• Steps to Reproduce the Issue

Furnishing us with this information will enable us to recreate the issue and conduct a thorough analysis on our end.

Thank you for your cooperation.

Best Regards,

Veena

[VeenaJ_Intel]

Hi,

We haven't heard back from you. Could you please provide an update on your issue?

Regards,

Veena

[VeenaJ_Intel]

Hi,

We have not heard back from you. This thread will no longer be monitored by Intel. If you need further assistance, please post a new question.

Regards,

Veena

[SamSamSam]

Hi,

Sorry for re-opening this topic but was there some development in the background or is there some official statement about how and in which extent Windows long paths are supported?

We are seeing exactly the same problem using Intel MPI 2021.1.6 on Windows and I am wondering if this is some known issue/limitation or if it basically should work?

Thx!

BR

Armin

[TobiasK]

@SamSamSam 
This issue never reached the developers, since the reporter never reacted on the request from Veena.

Please open a new thread with all required information and I will take care of it.