Library /sys$common/syshlp/basichelp.hlb Run time errors, DIVBY_ZER  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  Division by 0 (ERR=61)

  The program attempts to divide a value by zero.  Check  program  logic
  and  change  the  attempted  division,  or  trap the error in an error
  handler.