Thank you for the quick reply.
Unfortunately this does not seem to be working for me.
I have tried it in all kinds of permutations.

If I set the E-print folder to payable\general%btt or payable\general\%btt it still just goes to the general file.

I created the invoices file under general as you suggested but payable/e-print does not recognize it and still printed to payable/general

It did create a new parables/generalbr file automatically when I tried the user variable.

Could it be that the data used by %btt to identify the type of batch is somehow not being generated therefore appearing to be blank to E-print?

I can do Payables\general\%usr which gives Payables\general\br or I can do payables\general%usr which gives Payables\generalbr so maybe the data %btt uses is missing?