AME TO SUBMIT PO WITH USER RATE TYPE

ISSUE: Using the Approval Management Engine (AME) when attempting to submit a Purchase Order (PO) with 'User' exchange rate type for approval, the PO does not route for approval. In the AME Real Transaction Test Workbench the following error occurs:

ERROR: No rules are applicable to this transaction. Atleast one rule must apply to this transaction when the value of the attribute AT_LEAST_ONE_RULE_MUST_APPLY is true.

WORK AROUND:
As a work around to use the USER rate type, add a custom attribute 'TOTAL' of type NUMBER and use it instead of DOCUMENT_TOTAL. This new attribute 'TOTAL' will have 'Dynamic' Usage Type and 'Value' = script to calculate the document total in single currency (functional currency).