We are very pleased to announce that the new AFNI Message Board framework is up! Please join us at:
https://discuss.afni.nimh.nih.gov
Existing user accounts have been migrated, so returning users can login by requesting a password reset. New users can create accounts, as well, through a standard account creation process. Please note that these setup emails might initially go to spam folders (esp. for NIH users!), so please check those locations in the beginning.
The current Message Board discussion threads have been migrated to the new framework. The current Message Board will remain visible, but read-only, for a little while.
I got the same error message with 3dfim+ and I happened to see this post.
In my case, after comparing datasets that "3dfim+" complains or not, I noticed that it is actually complaining that the input dataset does not have a time axis (a bucket instead of a 4D). So I provided (arbitrary) TR information with 3drefit and it works.