HI, everyone, I have an application that is launched by a shell command that accepts an application specific file as an argument to set up its environment and actions. What I want to do is click on the application specific file and have nautilus call up the appropriate script with that application as the argument. What I have done so far is to modify the script from being one per application file to a generic one accepting an argument. I have placed it in a path directory and so now I can from the location of the argument file launch it. The application in this case is Croquet Cobalt. My script for now is in a local directory called "bin". And it works from a terminal. I can be in the Cobalt home directory and type the command: cobalt.sh cobalt.1.image And the script runs, the Croquet environment as modified by Cobalt comes up and life is good. There are other images, and I can call them up as well: cobalt.sh CrusoeWeb.image Same result. Now I want to use Nautilus to call up the cobalt environment when I click on a ".image" file. So I pick a .image file in nautilus, and edit the properties: >custom command Open with command: cobalt.sh Save it and check the properties and sure enough cobalt.sh appears there. However when I click on the designated image file, nothing happens. No error message, no opening of the file, absolutely nothing. So, what have I done wrong, and its OK to think I'm stupid, I probably overlooked something very dumb. Regards, Les H