IDC0 Trace facility

This facility provides information that the IMS message DFS3672I cannot provide. To use the facility, enter: /TRACE SET ON TABLE IDC0. The facility traces the following events:

• Errors that occur in the IMS VTAM® exit routines (within module DFSCNXA0). These errors are also identified in a DFS3672I message, regardless of whether the IDC0 Trace is in effect.
• Errors that occur when attempting to log onto a nonexistent VTAM node (such as entering a /OPNDST command for a nonexistent terminal). IMS issues associated messages DFS2061I or DFS2062I.
• Synchronization anomalies that occur between the time that an IMS VTAM exit routine completes processing and the time that the request is accepted by normal IMS processing. The result is a X'6701' log record identified with a VTPO string.