Hello CONN community, 

I am currently running my preprocessing step on CONN and kept meeting with this error.


Computing mask... : Failed 'Realign & Unwarp'
Matrix dimensions must agree.
In file "/space/-/-/spm/spm12/spm_uw_apply.m" (v6301), function "spm_uw_apply" at line 229.
In file "/space/-/-/packages/spm/spm12/config/spm_run_realignunwarp.m" (v6554), function "spm_run_realignunwarp"


I have about 100+ subjects and a very few of them have this issue. The preprocessing step would continue running for other participants, but it crashes before going on to the next preporcessing step. Some participants have less sessions than others, would this be the issue?


Can I please get some help on this?

Thank you.

Originally posted by syoun:
Same problem here. did you found a solution?

Hi Fred,

That error indicates an unexpected dimensionality of your functional data (e.g. data may be a 2d image instead of a 3d volume, or its voxel-to-world affine-matrix may be incorrectly defined). I would suggest to try first simply visualizing your functional data for potential problems (e.g. load it in SPM or in CONN gui and see if it can be displayed and if it looks fine). 

Best
Alfonso
Originally posted by fred Sampedro: