Last week, we had one case where the MEG acquisition software (Acq) crashed when clicking the “abort” button to end a recording. This is not uncommon, but this time, the dataset was not saved. In my experience, this did not occur and such crashes would result in fully useable datasets.
As such, please keep an eye out for this issue and report it to me if it ever occurs again. I would also highly recommend immediately verifying if the data is saved after such a crash. Recall that data is saved under:
/exportctfmeg/data/<username>/ACQ_Data/<yyyymmdd>/
And the actual data is in a *.meg4 file under a *.ds folder. In our case, the .ds folder was entirely missing.