Looks like you have change the accidentaly changed the standard declaration in start routine, this is how it looks like usually
...............
....FORM startup
TABLES MONITOR STRUCTURE RSMONITOR "user defined monitoring
MONITOR_RECNO STRUCTURE RSMONITORS " monitoring with record n
DATA_PACKAGE STRUCTURE DATA_PACKAGE
USING RECORD_ALL LIKE SY-TABIX
SOURCE_SYSTEM LIKE RSUPDSIMULH-LOGSYS
CHANGING ABORT LIKE SY-SUBRC. "set ABORT <> 0 to cancel update
*
*$*$ begin of routine - insert your code only below this line *-*
* fill the internal tables "MONITOR" and/or "MONITOR_RECNO",
* to make monitor entries...............
Thanks
Abhishek Shanbhogue