If a user has more than 1000 lines of procedure, how will he/she test that where it is failing?

If a user has more than 1000 lines of procedure, how will he/she test

1.	If a user has more than 1000 lines of procedure, how will he/she test that where it is failing?
Answer» Check if any compile-time errors are COMING during compilation. Users can insert PROPER comments or loggers after or before each EXECUTION so that a proper hint is given about the ONGOING process and narrow down the error point.