[gradsusr] Error from HCURL

[Gisele dos Santos Zepka]

Hello users,

I need the value of the vorticity at each grid point of my domain. The 
error I found when doing a test is shown below.

ga -> set lat -30.0276
LAT set to -30.0276 -30.0276
ga-> set lon 307.994
LON set to 307.994 307.994
ga-> d hcurl(u(lev=500),v(lev=500))*1e5
Error from HCURL: Invalid dimension environment
    Horizontal environment (X, Y varying) is required
Operation error: Error from hcurl function
    Errror occurred at column 1
DISPLAY error: Invalid expression

What can I do to fix this? Please, help me!
Thanks,

Gisele



-- 
____________________________________________

Dra. Gisele dos Santos Zepka Saraiva
Meteorologist - Atmopheric Electricity
National Institute for Space Research - INPE
Av. dos Astronautas, 1758
São José dos Campos, SP
Brazil, 12227-010

Phone:++55(12) 3208-6841