To generate Fortran source for mix matrix and deduced parameters

For the 2.3 step, the following is the list of the input and output files.

Then the user should do the following things:

• Check the file out to see if there are some thing wrong
• Check the file model_state to see if there is the line

      model_generator1:=ok;
      model_generator2:=ok;
      model_generator2.1:=ok;
      model_generator2.2:=ok;
      model_generator2.3:=ok;