[Eeglablist] study file issue when analyzing two IVs

[Fran Copelli]

Hi,

I have 44 participants (22 GroupA, 22 GroupB). All participants were
exposed to the same experiment (9 condition types) and preprocessed in the
same way.

I am trying to visualize ERSPs, but when I try to compare the two groups, I
receive the error *"cannot handle conditions with different number of
components, (error occurred in function std_readdata() at line 290)"*

I am sure that all participants have trials in the 9 conditions, so it is
not an issue of missing data. The study generates ERSPs when looking at
type alone (toggled in the '*edit study design*' menu),  but when
generating for  groups, I get the error.

Please advise as this is basic functionality of the eeglab study. I have a
colleague who has groupxcondition comparison, and is analyzing in electrode
space (as opposed to source analysis, like myself), and she was able to
generate her ERSPs just fine.

Thanks

*Fran*

SMART Lab, Psychology Department