I apologize if this is a duplicate but I couldn’t find any solutions that worked or any symptoms identical to mine.
I have a VSTO Word AddIn I’ve been developing for awhile. I’ve never changed Visual Studio’s (2010) “Solution Configuration” before; I’ve just left it as Debug. But today my AddIn has stopped loading in Word. It appears in the list of Word COM addins (the list you get when you open word, go to Word Options \ AddIns), but the checkmark is off, and when I turn the checkmark on and return to that list of COM addins, it’s off again. Also the message for the AddIn in Word’s list of AddIns is just “Unloaded”; not anything like “Unloaded: an error occurred while…” Cleaning and rebuilding doesn’t help. Deleting its registry node in HKCU\Software\Microsoft\Office\Word\AddIns doesn’t help. Removing the AddIn from Word’s list of AddIns doesn’t help. I’m stumped.
The only clues I have as to what is going on are: 1) there is no output from my Build/Run when I am in Debug configuration. The Output window of Visual Studio is just blank. 2) When I switch to Release configuration in Visual Studio, my build/run now results in output in the output window and the addin loads properly in word. I feel like this information might help someone more knowledgeable than I about Word/VSTO/Visual Studio.
Help? Thank you.
I ended up fixing this by duplicating the “Debug” solution configuration. Now I have “Debug2” and it seems to work just fine.