VTAM reason codes (for data space)

Reason code: Explanation
MB_DATA_ON_DATA_SPACE: CMIP services has placed one or more messages in the data space.
MB_WARN_DATA_SPACE_FULL: Data space storage is full. Signal the appropriate application task to issue the MIBDisconnect function.
MB_ERR_CMIP_SERVICES_INACTIVE: CMIP services has terminated. Signal the appropriate application task to issue the MIBDisconnect function.

Note: Your read queue exit routine should be coded to ignore unrecognized reason codes and set the return code to 0.

Contents of register 15 are not examined when read queue exit routine returns. Any messages in the data space are the responsibility of the application program. CMIP services does not perform any special processing to build ROERs for these messages. The read queue exit routine continues to be driven every time the number of waiting messages in the data space goes from zero to one until the application program disconnects from the API.