Change $top_frame->destroy; to $toplevel->destroy; and it will work. You see you are destroying the frame in the new TopLevel window but not the new TopLevel window itself.

Update: BlueBlazerRegular beat me to it... That's what I get for trying an example out before posting it. ;)

In reply to Re: How to get rid of a TopLevel window by Mr. Muskrat
in thread How to get rid of a TopLevel window by blackadder

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