Brain dead - shouldn't this work?

[Jim Limburg]

G-Day all

Why won't this clause work?
EDIT USING e_purorder WHERE ponum IN (.vf_polist)

vf_polist is a comma delimted list created by choose command.

I get an insufficient space to process this form. I'm declaring
all the variables to the form prior to entry, but it chokes
on this line everytime.

Thanks
Jim Limburg