In Visual Studio 2005 with 'tools'>'options'>'projects and solutions'>'save new projects when created' unchecked, trying to save a WiX project fails:
Create a new WiX project, click 'Save all' toolbar button, this will bring up a save dialogue click 'OK', you get an error message 'No such interface supported'.
If 'save new projects when created' is checked 'Save All' doesn't open a dialogue, and project is saved successfully.
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This issue happens for several VS add-ins that I've tried out (for example, IronPython). To fix it, the Votive project system needs to support the IVsDeferredSaveProject interface.
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