If when you enter FIT2D the system responds:
fit2d: Command not found.
this means either that FIT2D has not been installed (properly), or that your PATH variable is not properly defined. Typically, FIT2D would be found in the /usr/local/bin directory.
Thus, your environment variable PATH should include this directory.
e.g. To add the /usr/local/bin directory to the search ``path'' for executable programs you can add the following instruction to your .cshrc file65:
setenv PATH /usr/local/bin:$PATH
If needed, you can download a version of FIT2D from the web and run it from our own directory. This may be necessary to get a more recent version.
See your system administrator, if you cannot rectify the problem.