How do I access the total number of subject?

Dear NMusers, I'm making PRED subroutine using Fortran 95 now. In my PRED subroutine, it is necessary to know the total number of subjects of the data. I found that the total number of subjects is described in the output file of NONMEM as "TOT. NO. OF INDIVIDUALS". So, I think it is accessible. Could you please tell me how to access the variable from PRED subroutine? Regards Ryota Jin Chiba university, Japan. email: ryota-j_at_chiba-u.jp