[gradsusr] issues with fwrite

[Geeta Geeta]

Hi all, 
I want to  write total rainfall forecast to one new file from the WRF output
Hence I am using fwrite command as, ga-> open wrf-outp_d01_2011060303.ctl 
Scanning description file:  wrf-outp_d01_2011060303.ctl
 Data file wrf-outp_d01_2011060303.dat is open as file 1
LON set to 73.9429 87.0571 
LAT set to 9.09704 21.7107 
LEV set to 1000 1000 
Time values set: 2011:6:3:3 2011:6:3:3 
ga-> set gxout fwrite
ga-> set fwrite dummy.dat
 FWrite file name = dummy.dat
FWwrite byte order is big_endian; format is stream
ga-> q fwrite
FWrite file is closed
FWrite file name is: dummy.dat
FWrite byte order is big_endian ; machine byte order is big_endian
 ga-> d rainc+rainnc
Error opening output file for fwrite
  File name is: dummy.dat
ga-> disable fwrite

It's not writing the data to dummy.datPls suggest
geeta 		 	   		  
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