Error exporting stream object to EEG structure

[ibrilma]

Recently, I get following error message when exporting any type of stream (audio,video,eeg) to EEGLAB:

Error using eeg_getdatact (line 206)
file /home/USER/Documents/CurrentStudy/sub-P001/ses-S001/eeg/sub-P001_ses-S001_task-Default_run-001_eeg_MoBI/home/USER/Documents/CurrentStudy/sub-P001/ses-S001/eeg/sub-P001_ses-S001_task-Default_run-001_eeg_MoBI/myaudiostream_ingmar.fdt not found.
If you have renamed/moved
the .set file, you must also rename/move the associated data file.

Error in eeg_checkset (line 683)
EEG.data = eeg_getdatact(EEG);

Error in pop_loadset (line 221)
EEG = eeg_checkset(EEG, 'loaddata');

Error in dataSource/export2eeglab (line 496)
EEG = pop_loadset( [name '.set'],path);

Error in Export2EEGLAB>onExport (line 41)
mobilab.allStreams.export2eeglab(data,evnts);

Obviously, there is something wrong with the filepath (duplication of the /home/USER/Documents/CurrentStudy part of the file path). But I can't figure out when, where or why that happens. Maybe the header file contains wrong information? the .set files are not readable by pop_loadset(), either. I am using the GUI for export. The error also occurs with data that worked without problems 2 month ago.