Hi, I wrote some codes to transfer an image file to grid. I used the no_realize option in the envi_open_file. The code compiled ok but when it runs, envi gave me the error: % ENVI_OPEN_FILE: Incorrect number of arguments. My code is like follows: ; Open the input file in ENVI envi_open_file, infiles, no_realize, r_fid=fid ; Gracefully exit if the user picked a bogus file if (fid eq -1) then return ;Query the number of samples, lines, and bands in the file envi_file_query, fid, ns=ns, nl=nl, nb=nb ; Select all bands in the file for output pos = lindgen(nb) ; Export the entire spatial extent of the dataset dims = [-1,0,ns-1,0,nl-1] ; Export the GRID file, referenced by file id envi_output_to_external_format, ESRI_GRID,$ fid=fid, pos=pos, dims=dims, out_name=outfilename