Are you using the EBS Technology Codelevel Checker (ETCC) utility?
The EBS Technology Codelevel Checker (ETCC) utility has been available for some time to assist with identifying any missing database patches needed by E-Business Suite 12.2. The utility has now been improved, most notably to include a new Middle Tier checker tool. The latest version provides two scripts rather than the previous single script. These scripts confirm that you have all the necessary technology stack patches installed on your EBS Release 12.2 system. We highly recommend using this utility to help ensure your Release 12.2 deployment is successful.
The ETCC utility can be downloaded via Patch 17537119 from My Oracle Support.