Calling a Program from Home Page. What's Wrong

[bobkrohn]

New user.
Wrote my first program. Catesian Coord System

P2RN - Polar 2 Rectangular North Coordinate
A = Azimuth
D = Distance

Return a difference in Northing


==================
EXPORT P2RN(A,D)
BEGIN
//

LOCAL N;
N:=COS(A)*D;

RETURN N;

END;
==================


Run this "P2RN(45,100)"

from the Home Screen and get:

"Error: Syntax Error"

Have tried using variables for input after storing values into them.

Can't call "P2RN(45,100)" from another program either.

Works with "Run" in program Editor however.

what am I doing wrong?