Set alternative editor for ModelSim
You probably need to set the editor with an absolute path.

Open a console, and use the "which" command to get the complete path to the binary of your editor.

For my computer and kate, it looks like this:

&gt; which kate   
&gt; /opt/kde3/bin/kate


Use that in the spot where the other question (and answers) say to enter the name of your editor.