Rem Dim crashes my desktop regularly

Sample show file with 12 Technospots, numbered 1 thru 12.
They are receiving their intensity instruction from a cuelist.
Just entering "11+12 [Rem Dim]" crashes the desktop process, making it "not responding". Sounds familiar to someone? Am I doing something wrong here? This is correct syntax, right?
What would be the solution? Software version 1.2.1? ;-)

Best regards and thanks for the help.

Mike