NUMBER:  74

  ERROR CODE:  E

  MESSAGE TEXT:  Floating underflow

  EXPLANATION:  During an arithmetic operation, a floating-point
  value became less than the smallest finite value for that data
  type.  The underflowed result was either set to zero or, depending
  on the value of the /IEEE_MODE qualifier when /FLOAT=IEEE_FLOAT was
  specified, allowed to gradually underflow.

  This error is not returned by IOSTAT.

  For ranges of the various data types, see the Data Representation
  chapter in the HP Fortran for OpenVMS User Manual.