There is no official documentation that lists all possible RFA Java Error OMM messages(MsgType.STATUS_RESP) and RFA Exceptions. However, the common Errors/Exceptions based on my team experiences are listed in the attachment.
The attachment also includes the possible root causes and their solutions.
Note: Some RFA OMM messages are received from ADS(A<number>) e.g.A20 or ADH(F<number>) e.g.F10. For the other errors sent from ADS/ADH, please refer to ADS/ADH documents.
The documents are in the RFA packages and available online at:
Please refer to RFA C++ RDM Usage Guide, RFA .NET RDM Usage Guide or Reuters Domain Models (RDM) documents for the usages and meanings of messages in each domain.
You can also refer to Developers Guide regarding how to use RFA messages.
RDM Usage Guides are available online, as mentioned in the previous answer.
For RFA Java, the document name is Reuters Domain Models (RDM).
In RFA Java Developers Guide, you should read Chapter 2 RFA Concepts and Chapter 3 OMM Package.