Debugger hangs with warning to a non existent file

[ZenonH]

Environment data

• VS Code version: 1.29
• Extension version (available under the Extensions sidebar): 2018.10.1
• OS and version: Windows 10
• Python version (& distribution if applicable, e.g. Anaconda): 3.7.1
• Type of virtual environment used (N/A | venv | virtualenv | conda | ...): XXX
• Relevant/affected Python packages and their versions: XXX

Actual behavior

hello.py:
msg="Hello world"
print(msg)

The code runs without break points.
With break point set on print statement:
Debugger hangs, Step into, step over, step out icons greyed out.
pydev warning refers to a py file that has long been deleted..
Watch variable: msg not available.

Expected behavior

Steps to reproduce:

Logs

Output for Python in the Output panel (View→Output, change the drop-down the upper-right of the Output panel to Python)

No Output, No problems reported

XXX

Output from Console under the Developer Tools panel (toggle Developer Tools on under Help)

XXX

[ZenonH]

I read thru some of the threads re: debugging.

I added this to launch.json "debugStdLib": true
And it worked!

Regards
Zenon

[ZenonH]

I figured it out.