Debugger not found

[GrahamB]

Sirs
I am having a problem debugging programs in qt designer. When attempting to use the debugger I get the following message:

Debugger '{4ed1e248-942b-46d8-9561-a48fd372a16f}' not found.

This is something that has just started in the last month or so. I don't know what I have done. Even a blank test program produces this error.
Any help would be gratefully received.
Thanks in advance
Graham Benney

[prasad_N]

You need to change debugger version to valid & existing debugger.
which version of Qt creator are you using ?