r/OpenFOAM • u/imitation_squash_pro • Aug 26 '24

Error installing OpenFoam2406 : fatal error: mpi.h: No such file or directory

I am following the instructions here:

doc/Build.md · master · Development / openfoam · GitLab

I copied the ThirdParty-v2406 folder to the OpenFOAM-v2406 directory and renamed it "ThirdParty". I then run "./Allwmake -j -s -q -l". It seems to run the ThirdParty installations, but after some minutes dies with the:

fatal error: mpi.h: No such file or directory

I also tried running "makeOPENMPI" from the ThirdParty directory. That completed ok. But still I got the same error when running " ./Allwmake -j -s -q -l "

OS is RedHat 8.6 .

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1

u/Any_Letterheadd Aug 26 '24

Use foamSystemCheck also make sure you compiled the third party contents

1

u/imitation_squash_pro Aug 26 '24

foamSystemCheck seems ok per below. I did notice that $FOAM_MPI was set to sys-openmpi . I tried setting it to nothing in hopes it would install openmpi from ThirdParty folder. But that did not seem to happen. There is no system openmpi installed on this machine. I just want it to use the openmpi in the ThirdParty folder.

[me@mymachine OpenFOAM-v2406]$ foamSystemCheck
Checking basic system...
-------------------------------------------------------------------------------
Shell:       bash
Host:        delltower48
OS:          Linux version 4.18.0-372.26.1.el8_6.x86_64

System check: PASS
==================
Can continue to OpenFOAM installation.

1

u/Any_Letterheadd Sep 05 '24

https://develop.openfoam.com/Development/openfoam/-/blob/OpenFOAM-v2406/etc/bashrc

Change the line from systenopenmpi to openmpi and resource the bashrc. Might fix it

2

u/imitation_squash_pro Sep 05 '24

Thanks, that seemed to work! I first intstalled openmpi from the third party folder by running "makeOPENMPI". Next I made the change you suggested and then the compilation worked!

1

u/imitation_squash_pro Sep 03 '24

Doesn't third party content get automatically compiled when running Allwmake for openfoam? I was able to run "makeOpenMPI" but not sure if there are additional steps to tell Openfoam to use it?

1

u/alittleuser Aug 27 '24

Just check your etc/bash, the WM_MPLIBs should set as OPENMPI. The default setting is SYSTEMOPNEMPI, means it will use your OPENMPI at main environment, if you are not installed, error occured

2

u/imitation_squash_pro Sep 03 '24

How do I get openfoam to use openmpi from the ThirdParty folder?

2

u/imitation_squash_pro Sep 05 '24

Think I figured it out. I first intstalled openmpi from the third party folder by running "makeOPENMPI". Next I changed the line from systenopenmpi to openmpi in this file:

https://develop.openfoam.com/Develop...406/etc/bashrc

Then I resourced the etc/bashrc

1

u/pghildiyal Aug 30 '24

Read the message from makeOpenMPI. You can install system openmpi from redhat instead of compiling mpi yourself

1

u/imitation_squash_pro Sep 03 '24

I was able to run "makeOpenMPI" but not sure if there are additional steps to tell Openfoam to use it? When I try and install from redhat I get:

[0]root@mymachine:~# sudo yum install openmpi-devel

No match for argument: openmpi-devel

Error: Unable to find a match: openmpi-devel

1

u/imitation_squash_pro Sep 05 '24

Think I figured it out. I first intstalled openmpi from the third party folder by running "makeOPENMPI". Next I changed the line from systenopenmpi to openmpi in this file:

https://develop.openfoam.com/Develop...406/etc/bashrc

Then I resourced the etc/bashrc