createVariableCopy() upcasting variables open from cdml catalog files.

[timbedin]

Calling the createVariableCopy() method on a newly created file object seems to create a double rather than a float variable when the variable to copy is open from a cdml catalog.
For example -

import cdms2

incat = cdms2.open('catalog.xml', 'r')  # A catalog made with cdscan.
invar  = incat['var_name'] 
invar.dtype  # dtype(float32)

outfile = cdms2.open('newfile.nc', 'w')
outfile.createVariableCopy(invar)

outvar = outfile['var_name'] 
outvar.dtype # dtype(float64)

Thanks

[doutriaux1]

Thx for pointing this out.