Hi Chris, you could force them to set a variable on the file's datacard, by setting a transition condition such as : "Variable xx Not equal to". That way the file can't pass until the variable is filled in.
It's a bit of a messy workaround, but the only one I can think of
Hope this helps.
This is a known issue. See knowledge base:
SPR# 541094 Admin selection: Must Enter state change comments! This should be set per transition.
You can contact your VAR to attach your company to this SPR.