WindowsSdkDir not found

Dear all,

I was using Intel Visual Fortan Compliler 11.1 with Visual Studio 2008 pro and Abaqus 6.12 to write and use subroutines in Abaqus. I had linked it properly and it was working fine before. However, today when I tried to use it, the Intel Visual Fortran compiler command window comes with an additional message that "WindowsSdkDir not found", and my subroutines are not working anymore. and when I run it, I get following erorr

"Problem during linking - Abaqus/Standard User Subroutines.   This error may be due to a mismatch in the Abaqus user subroutine arguments.   These arguments sometimes change from release to release, so user subroutines   used with a previous release of Abaqus may need to be adjusted."

Could somebody please help me with this?

Best regards,

Atefe