CDO

Hi,

My 'time' variable in ifile.nc has values 0, 1, 2, ..., 754, 755. I'd like to convert them to values 1951-01-16,12:00; 1951-02-16,12:00; .. ; 2013-12-16,12:00.
After setting the time axis, my time dimension is collapsed to size 1 though (taking the value of only the first time step, 1951-01-16,12:00):

ncdump -v,time ifile.nc results in
netcdf ifile {
dimensions:
z = 756 ;
variables:
float data(z) ;
float time(z) ;
data:
time = 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
...
752, 753, 754, 755 ;
}

Setting the time axis (cdo settaxis,1951-01-16,12:00,1mon ifile.nc ofile.nc) results in:
Warning (cdfDefVar) : Changed double entry of variable name 'time' to 'time_2'!
cdo settaxis: Processed 1512 values from 2 variables over 1 timestep ( 0.00s )

The resulting file ofile.nc has only one time step:
ncdump -v,time ofile.nc
netcdf ofile {
dimensions:
x = 756 ;
time = UNLIMITED ; // (1 currently)
variables:
double time(time) ;
time:standard_name = "time" ;
time:units = "month as %Y%m.%f" ;
time:calendar = "proleptic_gregorian" ;
float data(time, x) ;
float time_2(time, x) ;
// global attributes:
:CDI = "Climate Data Interface version 1.6.4 (http://code.zmaw.de/projects/cdi)" ;
:Conventions = "CF-1.4" ;
data:
time = 195101.5 ;
}

Thanks for any hints on how to get my time axis right!