When I try to open an assembly I get the message

"An error was encountered while trying to open your file. Contact Technical Support for a possible solution"

I get 8 pop ups of that, once I click OK to them all, the assembly opens.  One of the sub-assemblies has rebuild, once I open that assembly and rebuild I close it, the main assembly is fine and everything seems to be complete.

Anyone know what is happening, or how to resolve this issue?