Changing Values

An installation can control its APPC/MVS configuration with different versions of the APPCPMxx parmlib member. One member might contain start-up values and other members contain customized values. An APPCPMxx parmlib member can contain statements that delete previous statements (LUDEL deletes a previous LUADD) or the parmlib member can reissue statements with new parameter values that modify previous statements.

Examples of parmlib members used to delete and modify configurations appear throughout this chapter.

Note: When modifying previous statements by reissuing them, the parmlib statements have a cumulative effect; that is, any one parmlib member might not reflect the current configuration. If you use the CANCEL command to terminate the APPC address space, you must re-specify each parmlib member in its former order to reconstruct the previous configuration.