I've had the same problem when trying to define a contrast for a group analysis. One work around would be to use the spm jobman (batch utility) to define the contrast. After starting SPM5b just type "spm_jobman" at the command line. Select "New Stats", then "New Contrast Manager" and proceed. -----Original Message----- From: Matthew Brett To: [log in to unmask] Sent: 10/19/2005 10:24 AM Subject: Re: [SPM] invalid contrast again ! Hi, > When I encountered the error invalid contrasts entered for a PET model I was > analysing I tried the fix > > feature('JavaFigures',0) > > But it didn't fix it. Just for reference, this will only fix the problem where the SPM contrast GUI does not respond to the 'Submit' or 'Done' click in the SPM contrast manager, Best, Matthew