https://www.infopathdev.com:443/blogs/patrick/archive/2013/04/28/upgrading-to-infopath-2013-causes-caching-errors.aspxIf you have just upgraded InfoPath to 2013 and when you try to open InfoPath forms you get the following error string in your error dialog box details: Exception from HRESULT 0x80070002 it's probably an InfoPath cache issue. I upgraded from OfficeenCommunityServer 2007 SP3 (Build: 31118.962)