Storage dimension group is set to track both physical and financial inventory by warehouse.
The Item model group has post physical and financial inventory checked - using FIFO valuation.
Accounts receivable parameters are set to post the packing slip in the ledger... is there another parameter for transfer packing slips?
I've also tried changing inter-unit payable/receivable to use different accounts and still there is still no transfer order voucher being posted to the ledger.