CRCAPO ( x, y, z, point, ifail )
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  Create a cartesian point.

Receives:
  double                   *x              --- X coordinate value
  double                   *y              --- Y coordinate value
  double                   *z              --- Z coordinate value

Returns:
  KI_tag_point             *point          --- cartesian point
  KI_cod_error             *ifail          --- failure code

Specific errors:
  KI_bad_position           point must lie within the size box

Description:
  A point is created with the given coordinates.