MFG-MNT Job Receipts No GL Transaction MFG-WIP

We use both MFG and MNT Jobs. We have discovered that when you do a Job Receipt from a MFG Job to a MNT Job there is not GL Transaction! We only have one WIP account in the company but the Maintenance Job data should post to the Maintenance Expense on the Equipment Type.
Unfortunately the GL Transaction Type for Job to Job Receipt (WIP2 Account) doesn’t recognize the MNT job! At this stage it doesn’t look like Epicor is going to correct the issue so I am left trying to change the GL Transaction Types myself.
Has anyone had this issue and solved it?
Thanks in Advance.

Are you positive that you have created all of the GL Control Codes?

On the Maintenance Job, there is the Equipment which has Equipment Type. The Equipment Type has a GL Control with one Account Context - Maintenance Expense. This has been entered. If I do a miscellaneous Charge or a PO to the Maintenance job it works as expected.