Error importing epoched files

Bugs
1

Hi!
I was trying to import neuroschan epoched files but with almost files I got this error message:

** Error: Line 313: neuroscan_read_header (line 313)
** Unknown file format.
**
** Call stack:
** >neuroscan_read_header.m at 313
** >in_fopen_eeg.m at 28
** >in_fopen.m at 116
** >import_raw.m at 126
** >bst_call.m at 28
** >tree_callbacks.m>@(h,ev)bst_call(@import_raw,[],[],iSubject) at 631
**

I tried with several files, finally, one of these files could be imported, but without EEG electrode names, a second file could also be imported but again, the channel names was lost.

Thanks in advance!

2

Could you please send us an example file? (as small as possible)
Upload it somewhere, then post the download link here

Thanks
Francois

3

Hi!
Here is:

Thanks in advance!

4

I could import the file you sent with the menu "Import MEG/EEG" and the file format "EEG: Neuroscan".

Make sure you are using an up-do-date version of Brainstorm and that you don't have any conflicting toolbox in your Matlab path that could shadow some of the standard Matlab functions.

As I tested this, I fixed a bug that prevented to import this file AND doing a baseline correction at the same time : https://github.com/brainstorm-tools/brainstorm3/commit/43cf014cb43eb22c170d6abb5d556b0714767bdd
Update Brainstorm to get this last fix.

5

Thanks!
well, actually I was able to import that file too, but the electrode locations was wrong, channels names was E01, E02, instead of true names (Fp1, Fp2, etc)

6

Indeed, the label names have never been read by the import function while they are available in the file, and nobody ever complained about it...
I fixed it: https://github.com/brainstorm-tools/brainstorm3/commit/bfa3e65c39557c4ae88cc9ce4bd5c8fd3b43127e

Please update Brainstorm and try again.
Thanks for reporting the issue

7

Really Thank you for your support! :smiley:

8

PS: The file does not contain real 3D positions for the electrodes, but only a 2D layout used in the neuroscan software for display.
To get correct 3D electrodes positions: right-click on the channel file > Add EEG positions > ICBM152 > Neuroscan > pick your cap name in the list (or a cap with a higher number of electrodes and similar layout)

9

Thanks, I use generic positions :slight_smile:

But I still have problems importing some files, with the same error I posted here, I'm uploading the file and posting here as soon as I can.

Thanks in advance

10

Here is an example of Neuroscan EEG epoched files that I can not import:

I got the same message:

** Error: Line 313: neuroscan_read_header (line 313)
** Unknown file format.
**
** Call stack:
** >neuroscan_read_header.m at 313
** >in_fopen_eeg.m at 28
** >in_fopen.m at 116
** >import_raw.m at 126
** >bst_call.m at 28
** >tree_callbacks.m>@(h,ev)bst_call(@import_raw,[],[],iSubject) at 631
**

Thanks

11

Thanks for the example file.
I fixed the bug: https://github.com/brainstorm-tools/brainstorm3/commit/43aa671beec79e0abbe5173d1951b999a90ebb33

Please update Brainstorm and try again.

1 Like
12

Hi!
Sorry for the delay
It Worked!!!
Now I'm able to import these files,
but similar error appears when I try to import the some averaged (ERP) neuroscan files, I attach here the avg files and I post the error:
:
The file is a single electrode CZ FRN ERP:

the file was ment to build a grand average file, but actually is just a one subject record

Note: The averaged files was made in neuroscan, not in bS, but when I try to import them it crashes with this message:

** Error: Line 58: Index exceeds matrix dimensions.
**
** Call stack:
** >in_fopen_avg.m at 58
** >in_fopen.m at 118
** >in_data.m at 100
** >import_data.m at 200
** >bst_call.m at 28
** >tree_callbacks.m>@(h,ev)bst_call(@import_data,[],[],[],iStudy,iSubject) at 633
**

13

Thanks in advance

14

Bug fixed: https://github.com/brainstorm-tools/brainstorm3/commit/cc744d08dee4f8b1cd824e9292bbc07633dfa168

Please update Brainstorm and try again.

Thanks for reporting the issue

15

Wow!
That was quick!
Thanks!