c-----------------------------------------------------------
c     Defining the variables stored in a common block
c     (along with the common block itself) in a separate 
c     'include file' minimizes the potential for the many 
c     obscure and difficult to debug problems which can 
c     arise from the use of common blocks.
c-----------------------------------------------------------
      character*16    string
      real*8          v(3),        
     &                x,             y,            z
      integer         i

      common   / coma /
     &                string,
     &                v,                                
     &                x,             y,            z,
     &                i