For Distributed FileManager/MVS to process input DDM commands, the Central Address Space (DFM), which is a started system procedure, the APPC conversation, and the APPC Transaction Program address space (GDEDFM) must be successfully initialized. Failures in this initialization process are reported to the operator console. See Distributed FileManager/MVS system messages for more information. Additionally, an AGNPRMRM is returned. For more information, see Table 1.

After the Central Address Space, APPC conversation, and APPC Transaction Program are successfully initialized, the DDM data stream input from the source system is screened for syntax errors (SYNTAXRM), protocol errors (PRCCNVRM), and error communication messages (ERRCMNMSG). See Table 1, Table 2, and Table 3 for more information.

The DDM commands that successfully pass the preceding filters are next passed to the command processors. The command processors screen for errors detectable at that level, for example, command parameter error, environmental errors, execution errors. See Table 4 for more information.