Debug not kick into the correct breakpoint

Bug Report
,
1

*Summary
debug not kick into the correct breakpoint

*Steps to reproduce
1.test case A copy from another test case B

2.set breakpoints in test case A

3.debug test case A

*Expected Results

when meet breakpoint, should cursor in correct test case file and correct line

*Actual Results

when meet breakpoint, log info shows correct test case file, but cursor highlight in wrong(copied) test case file and also wrong code line

*Screenshots / Videos

image
image889×585 55 KB

*Blocker?
No

*Operating System
Windows 11

*Katalon Studio version
version 10.2.4

2
  1. Manually Clean and Rebuild Project
  • Close Katalon Studio.
  • Delete the bin/ and Libs/ folders in your project workspace.
  • Reopen and let Katalon rebuild—sometimes this resets file references.
  1. Recreate Test Case Instead of Copy-Paste
  • Create a new test case from scratch and copy only script content (not the test case object itself).
  • Save with a unique name to ensure metadata/IDs are not shared.
  1. Resave and Rename
  • Try renaming the new test case (test case A) after copying, saving, closing, and reopening it before debugging.
  1. Update to Latest Katalon Version
  • Some debugging and editor synchronization bugs have been fixed in recent releases
3

hey @flossilos_x_liu_manu

try to do Close and Clean up

Screenshot 2025-11-05 at 12.22.59
Screenshot 2025-11-05 at 12.22.59565×232 22.7 KB

4

I’ve run into similar issues where the debugger seems to just skip right past active breakpoints.

Have you tried doing a ‘Clean’ on your project and then restarting Katalon? Sometimes the compiled classes get a bit out of sync with the source code, and a fresh start usually forces it to realign. Also, it’s worth double-checking that you aren’t running in ‘Run’ mode by mistake instead of ‘Debug’ mode - I’ve definitely caught myself doing that more than once!

5

Are you still facing the issue?

6

Resolved — upgrade to Katalon Studio v11.1.3 (or v10.4.3 minimum).

Issue: After copying a test case, the debugger’s cursor highlights the wrong (copied) test case file when a breakpoint is hit, even though the log shows the correct file. Reported in v10.2.4.

Fix: Editor and debugger synchronization issues have been addressed in subsequent releases. We recommend upgrading to:

  • v11.1.3 (May 6, 2026) — latest, recommended
  • v10.4.3 (Dec 22, 2025) — minimum, if you can’t move to the 11.x line yet

If you can’t upgrade right away, workarounds:

  1. Clean and rebuild the project (delete the bin/ and Libs/ folders, then refresh).
  2. Recreate test cases from scratch instead of copy-pasting (preserves unique metadata/IDs).
  3. Resave and rename test cases after copying.

I will be marking this as resolved. If anyone still reproduces this on v11.1.3, please open a new report with steps.

Bella