Hi Gal,

Sorry for the delay in the response.

Please change 

P.Tasks={'a' 'b' 'c' 'd' 'e' 'f' 'g' 'h' 'blank' 'error'};

to

P.Tasks={'1' 'a' 'b' 'c' 'd' 'e' 'f' 'g' 'h' 'blank' 'error'}; or P.Tasks={'0' 'a' 'b' 'c' 'd' 'e' 'f' 'g' 'h' 'blank' 'error'}; 

depending on if every task needs to be in every run.

Once you have the new P-file set, try running P=PPPI_checkstruct(P). If you get no error messages, then you should be okay.

If it fails after this step, I'll have to think about how to test it without your exact dataset.

Does the test dataset work? This would determine if it's dataset specific or a more general issue?