Expected behavior
Test working correctly
Actual behavior
If user does not fill filename for View Result Tree then test does not start:

After clicks Append to existing file or Overwrite existing file user will see this in console log:
2025-11-19 07:54:16,745 ERROR o.a.j.g.a.AbstractAction: Could not delete existing file C:\Users\User\Desktop\apache-jmeter-5.6.3\bin
Test wil not start
Steps to reproduce the problem
- Install Java 25.0.1
- Install JMeter 5.6.3
- Run JMeter with UI
- Add Thred Group
- Add View Results Tree
- Run test
JMeter Version
5.6.3
Java Version
openjdk version "25.0.1" 2025-10-21 LTS
OS Version
Microsoft Windows [Version 10.0.26200.7171]