Reason codes for response: USER_ERROR

401: INVALID_CALL_TYPE
An invalid call-type parameter value is specified on this EXCI request.
402: INVALID_VERSION_NUMBER
The version_number parameter does not specify a value of 1 or 2.
403: INVALID_APPL_NAME
The user_name parameter consists of all blank characters (X'40').
404: INVALID_USER_TOKEN
The client application program has issued an EXCI request using a user token that is unknown to the external CICS® interface.
405: PIPE_NOT_CLOSED
A Deallocate_Pipe request has been issued against a pipe that has not yet been closed.
406: PIPE_NOT_OPEN
A DPL call has been issued on a pipe that is not open.
407: INVALID_USERID
A DPL request has been issued with a USERID parameter that consists of all blanks.
408: INVALID_UOWID
A DPL request has been issued with a uowid parameter that has invalid length fields.
409: INVALID_TRANSID
A DPL request has been issued with a transid parameter that consists of all blanks.
410: DFHMEBM_LOAD_FAILED
During Initialize_User processing, the external CICS interface attempted to load the main message module in preparation for issuing external CICS interface messages, and the load of this module failed.
411: DFHMET4E_LOAD_FAILED
The load of message module, DFHMET4E, has failed. During Initialize_User processing, the external CICS interface attempted to load its message table in preparation for issuing messages. The load of this module failed.
412: DFHXCURM_LOAD_FAILED
During Initialize_User processing, the external CICS interface attempted to load the user-replaceable module, DFHXCURM. The load of this module failed.
413: DFHXCTRA_LOAD_FAILED
During Initialize_User processing, the external CICS interface attempted to load the trap module (DFHXCTRA). The load of this module has failed.
414: IRP_ABORT_RECEIVED
While processing a DPL request, an error occurred in the CICS server region, resulting in an abort FMH7 flow being returned to the external CICS interface.
415: INVALID_CONNECTION_DEFN
A DPL request has been rejected by CICS because the target connection is not defined for use by an external CICS client application program.
416: INVALID_CICS_RELEASE
A DPL request has been rejected by the target CICS server region because it doesn't recognize the request.
417: PIPE_MUST_CLOSE
A DPL request has been issued on a pipe that is in a must close state.
418: INVALID_PIPE_TOKEN
An Open_Pipe, Close_Pipe, Deallocate_Pipe, or DPL request has been issued, but the pipe token passed on the call is either not a valid pipe, or is not a valid pipe allocated for this user (that is, there is mismatch between the user token and the pipe token).
419: CICS_AFCB_PRESENT
An Initialize_User request has been issued on a TCB that has already been used by CICS or by CICS batch shared database. The external CICS interface cannot share a TCB with CICS, ensuring that a CICS application program cannot issue EXCI requests.
420: DFHXCOPT_LOAD_FAILED
During Initialize_User processing, the external CICS interface attempted to load its options module, DFHXCOPT. The load of this module failed.
421: RUNNING_UNDER_AN_IRB
The EXCI call is issued under an MVS™ IRB, which is not permitted.
422: SERVER_ABENDED
While processing a DPL request, the CICS server application program abended without handling the error.
423: SURROGATE_CHECK_FAILED
424: RRMS_NOT_SUPPORTED
A DPL request omitting the SYNCONRETURN option has been made on a system that is not running z/OS® Release 5 (or a later, upward-compatible, release).
425: UOWID_NOT_ALLOWED
A DPL request omitted the SYNCONRETURN option, but specified a value of UOWID. This combination of parameters is not permitted on a DPL request.
426: INVALID_TRANSID2
A DPL request has been issued with a transid2 parameter that consists of all blanks.
427: INVALID_CCSID
A DPL request has been issued with a ccsid parameter that specifies an invalid value.
428: INVALID_ENDIAN
A DPL request has been issued with a endian parameter that specifies an invalid value.
429: DFHXCEIX_LOAD_FAILED
During processing of an EXEC CICS LINK call, the external CICS interface attempted to load the module (DFHXCEIX). The load of this module has failed.
430: DFHXCPRX_LOAD_FAILED
During Initialize_User processing, the external CICS interface attempted to load the module (DFHXCPRX). The load of this module has failed.

Parent topic: Response and reason codes returned on EXCI calls