CDO

Hello all,
I am kind of newbie so excuse me if the answer is obvious. So, I have a *.nc file with some rr (rainfall values over Europe) and I want to "cut" some lat/long values according to my needs. I have followed the instructions from the user manual but I think I have missed something. So far, I have tried to call the sellonlatbox but I get this error:
PS C:\Users\Kaiju\Downloads\rr_0.25deg_reg_1995-2013_v10.0.nc> cdo sellonlat,20.289,29.719,48.245,43.622 .\rr_0.25deg_re
g_1995-2013_v10.0.nc test.nc
Operator >sellonlat< not found!
Similar operators are:
selall masklonlatbox sellonlatbox selmon setclonlatbox
PS C:\Users\Kaiju\Downloads\rr_0.25deg_reg_1995-2013_v10.0.nc> cdo sellonlatbox,20.289,29.719,48.245,43.622 rr_0.25deg
_reg_1995-2013_v10.0.nc test.nc

cdo sellonlatbox (Abort): Too many streams! Operator needs 1 input and 1 output streams.
PS C:\Users\Kaiju\Downloads\rr_0.25deg_reg_1995-2013_v10.0.nc>

cdo sinfo rr_0.25deg_reg_1995-2013_v10.0.nc
File format : netCDF
-1 : Institut Source Ttype Levels Num Points Num Dtype : Parameter ID
1 : unknown unknown instant 1 1 93264 1 I16 : -1
Grid coordinates :
1 : lonlat : points=93264 (464x201)
longitude : -40.375 to 75.375 by 0.25 degrees_east
latitude : 25.375 to 75.375 by 0.25 degrees_north
Vertical coordinates :
1 : surface : levels=1
Time coordinate : 6940 steps
RefTime = 1950-01-01 00:00:00 Units = days Calendar = standard
YYYY-MM-DD hh:mm:ss YYYY-MM-DD hh:mm:ss YYYY-MM-DD hh:mm:ss YYYY-MM-DD hh:mm:ss
1995-01-01 00:00:00 1995-01-02 00:00:00 1995-01-03 00:00:00 1995-01-04 00:00:00

Thanks a lot!