Desktop Files not found

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It was the #!/usr/bin/env xdg-open missing and the fact that there cannot be an empty line between #!/usr/bin/env xdg-open and the [Desktop Entry] line. Thanks!

some more background info: https://specifications.freedesktop.or...

I can't make it work for my program DS9. I have the following desktop file:

$ cat ds9.desktop 
[Desktop Entry]
Name=DS9
Comment=Astronomical Data Visualization Application
Exec=/home/german/bin/ds9
Icon=/home/german/Pictures/sun.gif
Terminal=false
Type=Application
Categories=Science;Astronomy;
MimeType=application/fits;image/fits;image/x-fits;

X-Desktop-File-Install-Version=0.22

Even with the line you mention it doesn't work. And I didn't find anything about that line in the documentation of desktop files. Any thoughts?

@skytux : true, the documentation doesn't mention that one line. My personal experience was that at some point my manually created .desktop files were not working, and after some online research I found the solution to my problem: #!/usr/bin/env xdg-open Unfortunately, I can't find the same source right now but I think it was in fedoraforum.org

Doing a quick search now, I found this, which talks a bit about the hashpling.

Really interesting that the freedesktop's documenation doesn't mention it.

Thanks @florian! I'm going to take a look at that link.