Creating Account Code Combinations in Purchasing

[fergusk]

We have turned Dynamic Inserts ON in Oracle General Ledger. In the Distributions field in Purchasing, when trying to create an Account Code Combination which doesn't already exist, the following message is returned - APP-FND-00005. Incorrect arguments were passed to user exit #MESSAGE_NAME *FND. Please correct the user exit call in your form exit. The combination we try to create is valid and complies with all Cross Validation Rules. Has anyone come across this before and know the solution