[modeller_usage] 'import site' failed; use -v for traceback

Hello, when I execute Modeller 9v4 script I get python warning 'import site' failed; use -v for traceback

Everything seems to work just fine though this message is a kind of annoying. I`ve searched the list and tried to tweak PYTHONHOME/PATH vars but that did not help. Furthermore I have python 2.5 installed and modeller uses built-in 2.3. Considering that I have no intentions of using external python modules could this message cause me a problem with my work? Thank you for your help. SDA