Yes, indeed. Those were problems, fixed now. For some reason I'd commented out the "use warnings" for some temporary reason and forgotten to turn it back on.

I think the majority of my memory leak originated from that as fixing them all had good effect prior to any serious attempt with TK's "withdraw" and "raise" methods.

My memory use now climbs up rapidly until the largest file has passed through the editor in auto-edit mode. Then it climbs only ever so very slowly with fifty or more windows being destroyed/re-created as per the other suggestion.

Thanks much,
Gan