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

  Floating point error (ERR=48)

  A program operation resulted in a floating-point number with  absolute
  value  outside the range 10^-38 to 10^38.  Check program logic or trap
  the error in an error handler.