Credit Memo Application to Invoice Error: This function did not find all the required arguments.

I have written procedure to apply credit memos to invoices using ARP_PROCESS_APPLICATION.cm_application. This procedure gave above error due to some data issues. Above error is displayed using message name "AR_ARGUEMENTS_FAIL". I looked into the package ARP_PROCESS_APPLICATION to pinpoint error location and i found this message have been used at multiple places and this error is thrown if a particular argument is NULL. i feel that developer should have used message token to include argument name(s) that is/are null. it would have saved my time.