Q: MATLAB (OS X) works fine after the initial install, but then I receive a Matlab License Manager Error -97?

Answer

To fix this, carry out the following procedure.
Note: This solution only applies to users using a Standalone MATLAB license on a Mac OSX machine that is set to use DHCP (usually a laptop).

1. Quit MATLAB completely.
2. Edit the file /Applications/MATLAB7/etc/lmopts.sh using TextEdit or emacs. (Change /Applications/MATLAB7 to the appropriate directory if MATLAB was installed elsewhere.)
   1. Find the line that contains exactly the following text:
      
      LM_USING_DYNAMIC_HOSTNAMESdefault="0"
      
      
   2. Change the 0 to a 1 and save the changes.
   3. Then, in a terminal window, type this:
      
      /Applications/MATLAB7/etc/lmstart
      
      and press Enter
      
3. Restart MATLAB.