Hi Victor,
- The .pos file you sent is empty. Can you please share with us the channel.mat file from the Brainstorm database, to check if we can reproduce this on our end?
- Do you get the same error if you use lower number of points for the BEM surfaces (eg. 642/482/482)?
- Can't you see any other warning or error message immediately before this one in your command window?
- What OS and Matlab versions are you using?
@Alexandre @sik There are similar unresolved issues that were discussed previously, maybe this is related to one of them:
Cheers
François