Every time I try to migrate my 2012 C3D survey databases into C3D 2013 I get an error and it fails. I've read everything I can find and am not sure what the issue is with my installation. I prefer to use 2013 and have been since it was released. It does not matter if I try to migrate each database individually or try to migrate all of them.
I have a 64 bit Win 7 OS. This is the only error information I get when I try to migrate my databases.
I finally solved the probelm on my own. I reinstalled .NET 4.0 and repaired SQL Server Compact. I restarted my computer and opened the drawing file in C3D 2012 to be sure the database was OK. I then migrated the survey database(s) into C3D 2013. I hope this is helpful for others.