Hello, I am a new user, so my apologies for the simple question. I am trying to re-run a 1st level analysis that has been estimated. I want to re-run the same analysis adding time derivatives. Is it possible to insert the previously used .mat file so as not to have to re-insert the previous contrasts? When I try to insert the .mat file into multiple conditions or simply try to load the .mat file, I am getting an error message. The previous analysis was run on SPM5 and I'm trying to reanalyze in SPM8. Again, sorry, this is probably a very simple question. New user. -- The University of Edinburgh is a charitable body, registered in Scotland, with registration number SC005336.