You can find help here:
https://neuroimage.usc.edu/brainstorm/Tutorials/TutBem
If you can't make it work:
- Look for all the existing OpenMEEG bug reports on the forum, you might find one that has exactly the same error code and context as yours.
- Otherwise, please start a new topic to discuss this problem. Include screen captures, and the files that are requested for debugging in all the other OpenMEEG bug reports