Tracing errors in module DFSCNXA0
DFSCNXA0 is the interface module between IMS™ and VTAM® for all logon processing and abnormal session termination processing. It is often the first module to be notified when a failure occurs on a session and is always the first to get control when a node connects to IMS.
The session attributes are verified and the IMS session control blocks are built before the connection request is passed on to signon processing in IMS. The module consists exclusively of calls to VTAM exit routines.