Value cannot be null. Parameter name: instance regarding active reports

February 14th, 2013 by admin Leave a reply »

Are you getting a error screen when you try to open your Active Report design files similar to this one?

I was beating my head into the wall trying to figure this one out and finally simply removing all the active report references I had in my project and adding them back in, then doing a Build->Rebuild Solution did the trick, hope this helps.


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