[JW Lua] Deleting groups...

[Jan Angermüller]

When deleting from a collection class always use eachbackwards() instead 
of each() and never save the collection afterwards.
This code should work:

> if finenv.FinaleVersion >= 2011 then
>
>   groups = finale.FCGroups(0, 0)
>   groups:LoadAll()
>
>   for g in each*backwards*(groups) do
>
>     if g:GetItemID() == 18 then
>
>       g:DeleteData()
>
>     end
>   end
> end


Jan
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