Dear Bill and friends,

Great! It's working!!!

With the line

A2_PATH=13;x:\USNO\

in guide.dat file, all the stars of A2.0 are immediately showed. The number
after the = is the "lower" magnitude limit and not the "upper" limit as I
originally understood.

Thank you a lot!

Best regards,
Elia Cozzi
New Millennium Observatory - MPC Code A24