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Message: [QUOTE="David White, post: 1472480"] This function does an infinite recursive call. Did you mean object.extract(is)? Why not make this function a friend of the class, and let it do what the class extract function does, and get rid of the extract function? Why take two steps when you can take one? With this, you can't read into an existing object. All this looks like a lot of trouble. Again, you can't read into an existing object. Of all these, version 1 (suitably modified) looks the best to me, but maybe you have special reasons for preferring another. DW [/QUOTE]