Dear SPM group: When attempting to perform slice timing correction using option #4 "User Specified" Interleave, SPM will not accept any inputs. The data in question is a set of 23 sagittal scans acquired left to right with GE epibold interleaving (1 3 5 etc). I'm wonderling if anyone has encountered this problem and perhaps has a fix. We are using Matlab 6 under Linux 7.1. Is there a hard coded default option we need to change to enable the user specified option? Thanks for any suggestions! Andy Saykin