[RegCNET] dear regcneters

[nacer]

hi,
please can anyone help me to tell me ,the version of grads that work with RegCM 4.1 ,because ican't open the file  test_001_DOMAIN000.nc.ctl 
when i try the command open test_001_DOMAIN000.nc.ctl,
i obtain the following message :

Open Error:  Data file type invalid
  --> The invalid description file record is: 
  --> dtype netcdf
  The data file was not opened. 
where is the problem?

thanks for all by advance.
n.kessali