Some attempts: 1) Inserted the line 
$text->delete('0.0', 'end');

[download]
anywhere possible. 2) Deleted all references to "privateData". 3) Added, removed and changed: 
$mw->withdraw;

$mw->protocol(WM_DELETE_WINDOW => [ $mw => 'withdraw']);

$mw->Advertise('text' => $text);

$mw->Redirect(1);

$mw->destroy;

$mw->OnDestroy([ 'DecrementReferenceCount' => $error_window ]);

[download]
My current suspicion is that something could be added or changed in the following line of the Populate subroutine: 
$mw->protocol(WM_DELETE_WINDOW => [ $mw => 'withdraw']);

[download]
but I don't know what.
we are the music makers and we are the dreamers of dreams - ww

In reply to Re^6: Tk::Stderr flush by honyok
in thread Tk::Stderr flush by honyok

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