Thank you for your time and code. The penny dropped (which I quickly picked up to add to my therapist fund) when I saw the comment re exportselection.

"Every man is a damn fool for at least five minutes a day. Wisdom comes in not exceeding that limit." - Elbert Hubbard
I have exceeded my limit for the day! And in the interest of political correctness I was going to replace 'man' in the quote by entity but that would imply a woman (or alien for that matter in deference to the entity having the human experience) can be foolish and as a married man it would be foolish of me to imply that, as for aliens (assuming they have a choice) well they are just foolish for being here.

In reply to Re^2: Tk::Listbox and Selection unexpected changes by WayneRas
in thread Tk::Listbox and Selection unexpected changes by WayneRas

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