Bill, further to my last email,

When I select the file NEA.DAT in my folder "Asteroid MPC", it creates
the line "MPC_PATH=C:\Asteroid MPC\NEA.DAT" in guide.dat.

Instead of creating the line "MPCORB_PATH=C:\Asteroid MPC\NEA.DAT".

When "MPC_PATH" is changed in guide.dat to "MPCORB_PATH", it works fine
and only shows the NEA asteroids.

Denis