I have a similar problem with a different twist. My addin works fine on all the PC's I have installed it on except one. The main difference on the face of it is that the problem PC is running Windows 7 64 bit while the rest are running XP. I have not determined what the issue is here. Has anyone else had problems with addins on specific PC's ? The symptoms are the same as reported on this thread, when the buttons on the addin toolbar are clicked they turn grey and do not execute. The names in the XML match the classes that are being executed. Keith AM Adlam British Geological Survey
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