I upgraded from 4.0.3.0 to 4.0.3.1 last night to make sure it wasn't a version issue. Same result. I opened a case with Second Level support last night.
I ust tried this in FFC v4.0.3.1 and it is working as expected. Please escalate this to the hotline as that should be working.
I have the job name defined as: $FFQuantity$_$FFWeb Width$_$FFwfDoc.documentHeight$_$FFBindStyle$
When I run the job, the file name is:
20_19.5_$FFwfDoc.documentHeight$_T4S.pdf
It appears if the variable doesn't come into Max, it won't come out.
That variable is for the height of the PDF trimbox in the document. If the imposed documents are smaller than the press sheet then that will be smaller than the press sheet height.
If you want the press sheet height use $FFwfDoc.documentHeight$
I tried $FFwfDoc.trimHeight$ as part of the name, but that didn't work. My impositions use automatic height, and I want that height in the job name.