Pmw exceptions

[Dan Underwood]

I've had these occur when I inadvertantly had deleted a widget then
tried to reference it, like deleting a pane from a PanedWidget.
[...]
> TclError: bad window path name ".135904648.136185616.136517944.136580888.136581216.136582336"
> 
[...]
> TclError: invalid command name
> +".135436696.136171776.136299000.136254976.136330840"
[...]

No experience with the last one.
> 
> And then totally random ones that are related to
> my code, but not in any way that I can see that
> changing anything would help:
[...]