VMS Help  —  FORTRAN  Run Time Messages, SQUROONEG
  NUMBER:  84

  ERROR CODE:  F

  MESSAGE TEXT:  square root of negative value

  EXPLANATION:  An argument required the evaluation of the square
  root of a negative value.  The result returned was the reserved
  operand, -0 for VAX-format floating-point and NaN for IEEE-format
  floating-point.
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