Hi Matt/Alexander/Chris,

Thanks for all the suggestions. The fix wasn’t as drastic as re-installation of the operating system,  system restore on Windows 7 did the job.

What I did was quite stupid. I will be more careful next time.

Thanks,

Amitava

Amitava Roy

J. Bennett Johnston, Sr., Center for Advanced Microstructures and Devices (CAMD)

Louisiana State University, Baton Rouge, LA 70806