Help extrapolate geopt 1000 mb

[apextreme]

I have problems in plotting the 1000 mb geopotential in grads:

set contour gxout
set lev 1000
d geopt

Income commands as stated above and the contours are plotted only on the value 0 and just above the sea.

For grads not draw contours on the value 0?
For grads not draw contours on the continent?
It is because wrf model uses sigma levels?

help!

[a3251w]

Hello!there were some error in your program!
correct:
set gxout contour
set z __(see your ARWpost, how much level do you have,if you have 1000,950,900,and you want to draw 1000mb, then you fill 1 in the blank,if you want to draw 950mb,then fill 2......)
d geopt

I hope that they will help you!!

[a3251w]

Sorry!
I correct what I said

set z __
set gxout contour
d geopt

above is right!