Change Function processing flow including key normalization, record retrieval, logical join validation, screen editing, database update, and screen return processing. URL anchors must be populated from the MAGEC master index. The business rule (RULPROC) pertaining to any of the MMP's elements from the primary Data Class will be inserted immediately after the %CALC logic. It could set the ERROR-FOUND condition causing the program to take the error path, bypassing the updates. AA100-CHECK-FUNCTION %PREINIT BA100-INIT-STORAGE %INIT AAM200-MAINTENANCE-MAINLINE %PFKEYM BA210-MAINT-SCREEN %INITTATB BA400-NORMALIZE-MAINT-KEY %NORMKEY AAM410-READ-BY-KEY %REDKY AAM420-READ-BY-KEY-FOR-UPDAT %RDUKY JA100-LOGICAL-JOIN %JOIN Determines continuation mode versus new transaction mode. BB200-FILL-SCREEN %COMP BB100-BLANK-SCREEN %BLNKSCR BB500-SCREEN-EDIT %EDIT BB500-SCREEN-EDIT %EDIT2 BB600-BUILD-REC %CALC AAM740-RELEASE-EXCL-CONT %RELES AAM720-UPDATE-DATABASE %UPDAT AAM751-UPDERR %UPDERR AA800-SEND-SCREEN %SNDSCRN AAM753-GOODCHG %GOODCHG AA900-GOBACK %GOBACK AAM410-READ-BY-KEY AAM420-READ-BY-KEY-FOR-UPDAT BB100-BLANK-SCREEN BB100-BLANK-SCREEN BB500-SCREEN-EDIT BB200-FILL-SCREEN AA800-SEND-SCREEN AAM740-RELEASE-EXCL-CONT AAM740-RELEASE-EXCL-CONT AAM740-RELEASE-EXCL-CONT AAM740-RELEASE-EXCL-CONT

Normalize maintenance key, retrieve the target record, perform logical join validation, prepare or edit screen data, build the update record, execute database updates, send the resulting screen, and return to the caller.