Using mex code with OpenMP while running matlab with bumblebee's optirun causes crash.

I am using Linux Mint 17.1 Rebecca (linux kernel 3.13.0-49).

I am running a matlab script which calls a mex function, which calls a fortran routine that uses OpenMP.

When I run the script in a matlab session which is opened normaly, the code runs fine.

When I launch matlab with bumblebee's optirun, my GPU mex codes work fine, but now the OpenMP mex code crashes matlab.

The crash happens AFTER the OpenMP code competes successfully.

Is this a bug in bumblebee?

I compile my codes as:

   gfortran -c -mtune=native -fPIC -O3 -DNDEBUG -Wall -Wextra -fopenmp euv2chm.f
   mex euv2chm_mex.c euv2chm.o -lgfortran -lgomp

Any ideas?

 - Ron