5 5 45   Make n_comphep
   This menu function is  used to perform
 several steps of evaluation in the 
 background mode. They are 
   a) symbolic calculations,
   b) writing results in the C format to files,
   c) compilation of C codes and creation of 
 the event generator file 'n_comphep_c', which 
 can be used for the subsequent simulations.