1) You can use report RPR_ABAP_SOURCE_SCAN.
2) Old method is to use report RSRSCAN1. Use with the Z* in the program parameter to search in custom programs only.
Otherwise, it will take a long time to search. Enter the string to-be-searched in "Find string parameter".
3) Try transaction EWK1.
If you already know program name:
Then use the function "Find in source code" in the ABAP Editor instead.
(Transaction SE38, Menu "Utilities" -> Find in Source Code) or Use program SAPLS_SEARCH
Verbatim copying and redistribution of this entire page are permitted provided this notice is preserved. All content on this website including archives (including text, photographs, audio files and any other original work), unless otherwise noted, is licensed under a Creative Commons License or later.