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I tried to visualize my WRF-Chem output file wrfout_d01_2015-12-25_00_00_00 using ncview after moving the file to the /run/media/maslab-3/exthdd directory where my 8 TB external HDD is mounted.

But when I gave the command ncview wrfout_d01_2015-12-25_00_00_00 the following error came:

ncview: can't recognize the format of the input file wrfout_d01_2015-12-25_00_00_00

However, the same file was in a different folder, and when I gave the same command, it was working.

I noticed that all the files in the /run/media/maslab-3/exthdd/ directory are green-colored. However, when the same files are placed in the other directories, they are white-colored, i.e., normal files. I noticed earlier that when I used the command chmod +x *filename*, the files turned green. So normally, green-colored files are executable files. I thought after using chmod a-x wrfout_d01_2015-12-25_00_00_00, it would work. But it didn't.

When I gave the command file wrfout_d01_2015-12-25_00_00_00, it returned the following line

wrfout_d01_2015-12-25_00_00_00: data

So, can anyone help me figure out how to solve this? That will be very helpful for me. Thank you for your time.

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  • Can you try to check file "original file" as gcode should be text. probably there is a mistake during the copy. Commented Apr 20, 2023 at 12:56
  • I don't understand this part "Can you try to check file "original file" as gcode should be text". Can you please elaborate on it a little bit? That will be very helpful. Commented Apr 20, 2023 at 14:51
  • can you perform a { file original file} as normally nc code should be revealed as text and not data. Commented Apr 21, 2023 at 7:22
  • This is the original file 'wrfout_d01_2015-12-25_00:00:00', which is the output of WRF-Chem and I renamed this to 'wrfout_d01_2015-12-25_00_00_00' for successfully copying the file in the /run/media/maslab-3/exthdd/ directory (since filename with colon is not supported in the NTFS or FAT drive). However, even if I performed "file wrfout_d01_2015-12-25_00:00:00", it returned the same thing "wrfout_d01_2015-12-25_00:00:00: data". And it is returning the same irrespective of the directory in which it is placed. But, the command 'ncview' is only working in other directories, not in /exthdd/. Commented Apr 21, 2023 at 10:22

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You need to append the wrfout file name with .nc for ncview to read it.

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