MOLDEN PROBLEM



 t
 Hi:
     I have some problems using MOLDEN3.2. When I enter to the Z-MATRIX
 editor and I want to submit a mopac file, The program says 'MOPAC_ROOT
  Enviromental variable not set ! ' . I could not compile MOLDEN on my PC
 so I download the executable. So I don't know how to submit the mopac
 file. Any help please.
                           Thanks.