HDF-SDS Read Error for dtype FLOAT32

[Henrique Barbosa]

Dear all,

I am trying to open monthly convective/stratiform heating
from TRMM:

http://daac.gsfc.nasa.gov/data/datapool/TRMM/01_Data_Products/02_Gridded/09_Monthly_Heating_CSH/index.html

for which I wrote this simple ctl:

dset ^CSH.021001.6.HDF
dtype hdfsds
undef -9999.9
xdef 720 linear -180.0 0.5
ydef 148 linear -37.0 0.5
zdef 19 levels 0.5 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
tdef 1 linear 00Z01oct2002 1mon
vars 1
LatentHeating=>lh  19 t,x,y latent heat
endvars

Grads opens the ctl successfully but complains when
showing the data with the following message:

ga-> d lh
HDF-SDS Read Error for dtype FLOAT32
Data Request Error:  Error for variable 'lh'
  Error ocurred at column 1
DISPLAY error:  Invalid expression
  Expression = lh

Does anyony know what it means? Any clues how to
solve it? Btw, I am able to read the data with official TRMM
software and write it as a plain binary. Hence it is not
a problem with the data, but with Grads being able
to read the HDF4.

[]'s
Henrique