Steve's solution worked beautifully. I needed a (1) Header Source file that had the Batch Number, Receipt Number, Check Number, Check Amount and Customer ID and a (2) Detail Source file that had the Receipt Number, Check Number, Check amount, Customer ID, Invoice, Apply Amount and Apply Entire Amount. In our world, we can under apply to an invoice, apply the exact amount and over apply. We need to set the "Apply Entire Amount" field to "TRUE" to allow an over apply condition otherwise we set the field to "FALSE.
What I would like to do is write a Before Query Script (which I do not know how to write) that would compare the Apply Amount to RM20101.CURTRXAM. If the Apply Amount in the source is greater than the CURTRXAM, move "TRUE" to source field "Apply Entire Amount" else move "FALSE". Can anyone help me on this?