Hi there, I am wondering if you can help (fsl beginner)? I have tried to run a group analysis which runs through until the command fslmerge -t mask, where it gives this error message: child killed: SIGABRT END OF ERROR MESSAGE child killed: SIGABRT while executing "if { [ catch { for { set argindex 1 } { $argindex < $argc } { incr argindex 1 } { switch - - [ lindex $argv $argindex ] { -I { incr arginde..." (file "/usr/local/fsl/bin/feat" line 309) Error encountered while running in main feat script, halting. child killed: SIGABRT Thank you for your help in advance, Charlotte Horne PhD Student Department of Psychology University of Roehampton | London | SW15 4JD