Hi I hope someone can help me with this one.

I have a UDF, which I have used with no problems in the past. However I am now trying to use it, and I'm getting a VERY strange message - error 27 'Not a numeric expression', the really baffling thing is that the command which gets this error is 'SHOW GETS'. I've tried deleting the .spr and regenerating the screen, but it didn't make any difference- does anyone know why this could be happening?