[GRASS-user] Python Script is not able to find a file in a different Drive

Greetings

I have a python script that needs to get a file (import a raster). I have tried in Ubuntu and also in Windows and it works but, When I have that file in a different hard drive (D: instead of C: where WinGRASS is installed) os.path.isfile(input) is false… Why? is it some limitation of GRASS?

Thanjs~
Jenny