Log error

[knighsson]

I used my code to run a multiple linear regression, 10 days ago it worked. When I run the same code again today, I can still get the results. However, Log showed some error as the pic I attached below. So does anyone have an idea what went wrong? 

Thank you!

[Tom]

What kind of library is the libref NH pointing to?  Looks like you might have lost your connection to the data in the middle of running the procedure.

[knighsson]

Thank you!
I point the NH to my T drive.
libname NH "T:\......\NHANES\DATA";

So if I lost the connection to the data, how can I re-connect the data?

[SASKiwi]

Check in Windows Explorer to see if your mapped T drive is still showing - I'm assuming here you are running SAS on your PC. Try running your program several times. Is this an intermittent problem or does it occur every time? You need to raise this problem with your IT Help Desk as it is a networking issue and not something SAS can fix.