I do mainly C++ development, with some FORTRAN using Visual Studio 2013.
I just installed Intel Parallel Studio 16.0 Update 2 and now all my FORTRAN projects will not compile a single file , with above error " Operation could not be completed. Unspecified Error. No issues with C++. I can't specifically tie the issue to the "Update 2" as I had not opened any FORTRAN projects for a while...
The FORTRAN compilers seems properly integrated into Visual Studio. The FORTRAN options ( and compiler versions) appear in the Tools->Options. And I can create a "New" FORTRAN Console project from the Visual Studio "New->Project" menu. Yet trying to compile that project fails with the same error.
A complete uninstall of all versions of Intel Parallel Studio XE 2016, then a new install of Intel Parallel Studio XE 2016 Update 2 resolved the problem.