[gradsusr] Error from AAVE Invalid environment. Z, T, or E can't vary.

[saiguran loisulie]

Hi,

I run this script as it is in GrADS:
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'reinit'
'open shum.mon.mean.modified2.ctl'
'set t 1 12'
'define qclim = ave(shum, t+0, t=264, 12)'
'modify qclim seasonal'

'set x 1'
'set y 1'
'set z 2'
'set t 1 264'
'define qanom = shum - qclim'
'define q = aave(qanom,lon=34,lon=40,lat=-5,lat=-1)'
'd q'
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This is what happens:
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No hardcopy metafile open
All files closed; all defined objects released;
All GrADS attributes have been reinitialized
Defined variable is now climatological
Cannot plot data - all undefined values 
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What am I not doing right?
__________________________________________________________

Thanks,

saiguran
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