[gradsusr] How to generate .ctl from a .grb file in a grads under windows

[T. haghroosta]

Dear All, I have a .grb (grib 1) file, I would like to generate a .ctl file and after that .idx file. I did grib2ctl.pl filename.grb > filename.ctl, but I got this error : unknown command I also used this command : g2ctl but I got the error again. How can I do that in windows system? Regards, T. 		 	   		  
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