I got this error message: 
[once] w <Tk::Frame=HASH(0x295d6a76518)>
XS_Tk__Callback_Call error:bad anchor "sec": must be n, ne, e, se, s, 
+sw, w, nw, or center at 
……../site/lib/Tk/Widget.pm line 1218.
 …../site/lib/Tk/After.pm line 93.

[download]
and I could not find the problem widget.

I had edited the After.pm to be as below 

sub once
{
 my $obj = shift;
 my $w   = $obj->[0];
 my $id  = $obj->[1];

    print "[once] w <$w> \n";

 delete $w->{_After_}{$id};
 local $Tk::widget = $w;
 $obj->[4]->Call;
}

[download]
Line 93 is the last line.
I guess it would help if I could get the name of the widget from the data in the HASH.
However, I do not know how to do this – can some monk please help me?

In reply to Decoding a frame HASH entry by merrymonk

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