Hi
Here is some questions:
- Is this problem is for a specific project or a common issue for all project? how the debugger works if you create a new project with wizard?
- To identify if the problem is because of MQX OS Awareness. please set Target OS as "None", then see how the debug works?

- what board do you work with? FRDM or TWR board? I may suggest you update the debug port firmware and see how it works?
- backup current workspace .metadata folder then remove it from your workspace. test how debug works?
- if all above can not change anything, try reinstall CW. then test again. How does debug work?
Have a great day,
Jennie Zhang
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