CDO

Dear CDO users,

I really appreciate any help with the problem I am facing. Bellow I describe it.

I get one file with 6 variables, with 43 time steps. 2 variables have 38 levels, while the other 4 variables are in 37 levels.

So when I use the command:

cdo gradsdes myfile.grb

they produce myfile.gmp and myfile.ctl, however the ctl file is like this:

• Generated by CDO version 1.6.4 *
  DSET ^myfile.grb
  DTYPE GRIB
  INDEX ^myfile.gmp
  XDEF 202 LINEAR -60.904000 0.008995
  YDEF 201 LINEAR -3.893000 0.008980
  ZDEF 38 LINEAR 38 -1
  TDEF 43 LINEAR 12:00Z29sep2013 1hr
  TITLE myfile.grb 202x201 grid
  UNDEF -9e+33
  VARS 1
  var1 37 1,100 var1
  ENDVARS

What should be happening?

Thanks