@Francois the latest reported error I think is a bigger problem of incompatibility between inefficient importers with in_data_* and calling Import MEG/EEG.
in_fopen_bstmat assigns: FullPath = '';
Issue for investigation opened here.
I fixed the bug in this commit: Bugfix: Import directly from files converted to .bst on the fly · brainstorm-tools/brainstorm3@23341c5 · GitHub
We have issues with rebuilding the Brainstorm package at the moment, so please wait before updating Brainstorm and trying again. We'll let you know when the software is ready to be updated.
@PavanMagesh
And this is the process I follow to import the data
• Import MEG/EEG
• Choose file B2-3Hz_210827_155257.rhd
• Import full time window (0 to 300s) and events, and resample at 2,000 Hz
As @mpompolas mentioned, we did not design this menu "Import MEG/EEG" to import continuous files.
I recommend you follow the pipeline presented in the introduction tutorials instead: Use the menu "Review raw file" first, resample the file, and only then epoch your data.
https://neuroimage.usc.edu/brainstorm/Tutorials/ChannelFile#Review_vs_Import
@Francois @mpompolas @amadaabrego Latest brainstorm packages with the bug fix are available on the Downloads page.