Invalid MEX-file libesmumps.so : undefined symbo

Hello,

I am trying to use a mex file that allow to use the MUMPS solver with Matlab 2016b on Centos 7.3 x86_64.

I can successfully compile the mex file but it failed when I try to use it with the following error :

Invalid MEX-file
'MUMPS_5.1.1/MATLAB/dmumpsmex.mexa64':
/lib64/libesmumps.so.0: undefined symbol:
SCOTCH_errorPrint

Error in dmumps (line 40)
     [inform,rinform,sol,inst,schur,redrhs,pivnul_list,sym_perm,uns_perm,icntl,cntl,colsca_out,rowsca_out,keep_out,dkeep_out]
     =
     dmumpsmex(id.SYM,id.JOB,id.ICNTL,id.CNTL,id.PERM_IN,id.COLSCA,id.ROWSCA,id.RHS,id.VAR_SCHUR,id.INST,id.REDRHS,id.KEEP,id.DKEEP);

Error in diagainv_example (line 11)
  id = dmumps(id);

I don't understand what happens because :

1. the compilation process is OK

make ARITH=d dmumpsmex.stamp
make[1] : on entre dans le répertoire « /home/espieser/02_Outils/MUMPS/MUMPS_5.1.1/MATLAB »
cp -f mumpsmex.c dmumpsmex.c
/usr/local/MATLAB/R2016b/bin/mex -g -largeArrayDims -g dmumpsmex.c -DMUMPS_ARITH=MUMPS_ARITH_d -I/home/espieser/02_Outils/MUMPS/MUMPS_5.1.1/include   -I/home/espieser/02_Outils/MUMPS/MUMPS_5.1.1/libseq -L/home/espieser/02_Outils/MUMPS/MUMPS_5.1.1/lib -ldmumps -lmumps_common -L/home/espieser/02_Outils/MUMPS/MUMPS_5.1.1/PORD/lib -lpord -lmetis -L/home/espieser/02_Outils/MUMPS/MUMPS_5.1.1/libseq -lmpiseq -lblas -lscotch -llapack -lesmumps /usr/lib/gcc/x86_64-redhat-linux/4.8.2/libgfortran.so
Building with 'gcc'.
MEX completed successfully.
rm -f dmumpsmex.c
touch dmumpsmex.stamp
make[1] : on quitte le répertoire « /home/espieser/02_Outils/MUMPS/MUMPS_5.1.1/MATLAB »
make ARITH=z zmumpsmex.stamp
make[1] : on entre dans le répertoire « /home/espieser/02_Outils/MUMPS/MUMPS_5.1.1/MATLAB »
cp -f mumpsmex.c zmumpsmex.c
/usr/local/MATLAB/R2016b/bin/mex -g -largeArrayDims -g zmumpsmex.c -DMUMPS_ARITH=MUMPS_ARITH_z -I/home/espieser/02_Outils/MUMPS/MUMPS_5.1.1/include   -I/home/espieser/02_Outils/MUMPS/MUMPS_5.1.1/libseq -L/home/espieser/02_Outils/MUMPS/MUMPS_5.1.1/lib -lzmumps -lmumps_common -L/home/espieser/02_Outils/MUMPS/MUMPS_5.1.1/PORD/lib -lpord -lmetis -L/home/espieser/02_Outils/MUMPS/MUMPS_5.1.1/libseq -lmpiseq -lblas -lscotch -llapack -lesmumps /usr/lib/gcc/x86_64-redhat-linux/4.8.2/libgfortran.so
Building with 'gcc'.
MEX completed successfully.
rm -f zmumpsmex.c
touch zmumpsmex.stamp
make[1] : on quitte le répertoire « /home/espieser/02_Outils/MUMPS/MUMPS_5.1.1/MATLAB »

2. the symbol is present in the share object.

MATLAB$ objdump -TC /lib64/libesmumps.so.0.2 | grep SCOTCH_errorPrint
0000000000000000      D  *UND*  0000000000000000              SCOTCH_errorPrint

Do you have any idea on how to solve this issue ?

Thanks is advance for any help !

Best regards,

Étienne

Answer 1

[Jatin Waghela]

Please refer to the below documentation link which gives more information on troubleshooting MEX files.

https://www.mathworks.com/help/matlab/troubleshoot-mex-files-1.html

Also, If a symbol required by a shared library is missing, MATLAB displays a message similar to the one in this case.

The below link explains the Invalid MEX File Errors and how to find the dependencies using Dependency Walker utility from the website http://www.dependencywalker.com.

https://www.mathworks.com/help/matlab/matlab_external/invalid-mex-file-error.html

Also, you may also contact the author of the MEX file and see if they are aware of such known issues.