Hello everyone,

In the GUI of CONN 22v2407, I imported images from DICOM and tried to run the default prerocessing pipeline, selecting the option to read slice times from the BIDS json file. This file was successfully created upon import and contained the relevant field:

  "SliceTiming": [

  1.11,

  0,

  0.74,

  0.0925,

  0.8325,

. . .

During prerocessing, the following error occured:

Undefined function 'mtimes' for input arguments of type 'cell'.

Error in conn_setup_preproc (line 2618)

 else sliceorder=1000*reshape(str,1,[]); % (ms)

I tried to debug this, and in the file conn_setup_preproc.m made a break point at line 2602:

str=conn_jsonread(matlabbatch{end}.spm.temporal.st.scans{1}{1},'SliceTiming');

The resulting variable was a cell array:

K>> str

str =

  64×1 cell array

    {[1.1100]}

    {[     0]}

    {[0.7400]}

    {[0.0925]}

    {[0.8325]}

. . .

This caused the above-mentioned error in line 2618 with code:

else sliceorder=1000*reshape(str,1,[]); % (ms)

I suppose this line expects str to be a numerical array, not a cell array. So my guess is that there is a bug in function conn_jsonread.

Can anyone confirm this or explain what I may be doing wrong?

Best,

Dmitry