I was running Registration in Fdt GUI (5.0.4) and got the following application error message:


can't read "standard2str_warp": no such variable
can't read "standard2str_warp": no such variable
    while executing
"fdt_monitor $w "${FSLDIR}/bin/invwarp -w $str2stand_warp -o $standard2str_warp -r $registration(struct_image)""
    ("registration" arm line 51)
    invoked from within
"switch -- $probtrack(tool) {
    eddy_current {
        global eddy

        set errorStr ""
        if { $eddy(input) == "" } { set errorStr "You need to specify..."
    (procedure "fdt:apply" line 4)
    invoked from within
"fdt:apply .fdt keep"
    invoked from within
".fdt.apply invoke"
    ("uplevel" body line 1)
    invoked from within
"uplevel #0 [list $w invoke]"
    (procedure "tk::ButtonUp" line 22)
    invoked from within
"tk::ButtonUp .fdt.apply"
    (command bound to event)