Hello, 

I am having the same error as you did:

Error in runOnSampleData (line 49)
PPPI(P, ['/Users/marinefleury/Desktop/gPPI/running_gPPI_generic' filesep 'sampleData' filesep 'stats' filesep 'gPPI_sampleDataTest.mat']

How did you fix your error please? I tried renaming the contains.m file in the PPPIv13 folder but it is still not working.

I would be very grateful if you could help me with this.

Thank you!
Kind regards,
Marine