Fillet Command Trickery

This is probably another simple one but I tried many version on this last night and had some troubles. With the FILLET command in a VLISP program, why is it that this works:

(command "._FILLET" "r" "0.375")
(command "._FILLET" pt14 pt15)

but this does not

(command "._FILLET" "r" "0.375" pt14 pt15)

pt14 and pt15 are defined points and they are close to one another, one on a horizontal line and one on a vertical line which intersect. OSMODE is set to 0. When I carry out the FILLET command at the command line even using !pt14 and !pt15...it works. But when the code runs if I don't use two line it craps out.

You can try setting pickbox to 0