DELCON ( parent, child, ifail )
===============================

  breaks the connection between two entities

Receives:
  KI_tag_topology          *parent         --- parent entity
  KI_tag_entity            *child          --- dependent entity

Returns:
  KI_cod_error             *ifail          --- failure code

Specific errors:
  KI_not_connected          no such connection
  KI_wrong_entity           argument of wrong type

Description:
  The 'child' entity is detached from the 'parent' entity. The acceptable
  combinations of parent and child are:

           parent |          child
         ---------|----------------------------
         Body     | Point, Curve, Surface, List
         Assembly | Point, Curve, Surface, List

  All other detachments are either made automatically (e.g. attributes and
  features are deleted without being detached first), or more specific routines
  must be used. (e.g. DETGEO - detach geometry from topology).