Thanks David, I tried every combination I could think of entreating into the dialogue box, including c=[... but the same error kept occurring. I will try again without the comma tomorrow to make sure I didn't miss it. Kind regards, - Charles On 15 February 2012 12:34, MCLAREN, Donald <[log in to unmask]> wrote: > Did you use 1 -1 or 1,-1? > > You should use the former. > > > On Tuesday, February 14, 2012, Charles Malpas <[log in to unmask]> > wrote: >> Hi All, >> >> Sorry if this is a very naive question, but I am very new to SPM and >> am in the process of learning to use it to analyse FDG-PET data. I >> have set up a 2 sample t-test, and specified the contrast as 1, -1. >> However when I click 'submit...' the contrast does not apply and an >> error message is displayed in the matlab window: >> >> Error in ==> spm_conman at 1271 >> [c,I,emsg,imsg] = spm_conman('ParseCon', str, xX.xKXs,STAT); >> ??? Error while evaluating uicontrol Callback. >> >> I am running SPM8, but seem to have been able to make the contrast >> work with SPM5 on a different machine. >> >> Has anybody else had this problem? Am I just doing something very silly. >> >> Any help you could offer would be greatly appreciated. >> >> Kind regards, >> >> - Charles >> >> >> >> -- >> Charles Malpas >> MPsych (ClinNeuro) / PhD Student >> Psychological Sciences & Department of Medicine (RMH) >> The University of Melbourne >> >> Phone: 0451 116 434 >> Email: [log in to unmask] >> Skype: charles.malpas >> > > -- > Best Regards, Donald McLaren > ================= > D.G. McLaren, Ph.D. > Postdoctoral Research Fellow, GRECC, Bedford VA > Research Fellow, Department of Neurology, Massachusetts General Hospital and > Harvard Medical School > Office: (773) 406-2464 > ===================== > This e-mail contains CONFIDENTIAL INFORMATION which may contain PROTECTED > HEALTHCARE INFORMATION and may also be LEGALLY PRIVILEGED and which is > intended only for the use of the individual or entity named above. If the > reader of the e-mail is not the intended recipient or the employee or agent > responsible for delivering it to the intended recipient, you are hereby > notified that you are in possession of confidential and privileged > information. Any unauthorized use, disclosure, copying or the taking of any > action in reliance on the contents of this information is strictly > prohibited and may be unlawful. If you have received this e-mail > unintentionally, please immediately notify the sender via telephone at (773) > 406-2464 or email. > -- Charles Malpas Email: [log in to unmask] Phone: 0451 116 434 Skype: charles.malpas