On my UNIX workstation I use vi as my editor. Using vi it is difficult to find the error messages in the GAMS listing, which are marked by ''.
Vi will interpret the * as a wildcard, just like for instance the '.' and the '$. You can instruct vi not to do this by saying:
You even can put this in your .exrc file (in your home directory), so that this is executed each time you start up vi.
The other possibility is to have GAMS not write stars but something else, like ''. This can be accomplished with the dollar control statement: