VMS Help CC, /ERROR_LIMIT  *Conan The Librarian (sorry for the slow response - running on an old VAX)

     /ERROR_LIMIT[=number]
     /NOERROR_LIMIT

  Limits the number of Error-level diagnostic messages that are
  acceptable during program compilation.  Compilation terminates when
  the limit (number) is exceeded.  /NOERROR_LIMIT specifies that
  there is no limit on error messages.

  The default is /ERROR_LIMIT=30, which specifies that compilation
  terminates after 31 error messages.