typedef int PK_BODY_fault_t; This type indicates a fault in one of the PK_BODY_create_<body_type>_topology functions. In most cases a `fault-index' is also returned which is the index in the classes array of the faulty entity. PK_BODY_fault_t Meaning fault_index PK_BODY_fault_bad_body_c PK_CLASS_body appears in classes none array but not at the first position PK_BODY_fault_unknown_c unknown fault none PK_BODY_fault_unknown_child_c unknown child none PK_BODY_fault_duplicate_child_c a parent-child relation is repeated parent PK_BODY_fault_wrong_child_c a child is of the wrong class child PK_BODY_fault_missing_child_c a parent has too few children parent PK_BODY_fault_extra_child_c a parent has too many children parent PK_BODY_fault_wrong_parent_c a vertex has edge and loop parents vertex PK_BODY_fault_missing_parent_c a child has too few parents child PK_BODY_fault_extra_parent_c a child has too many parents child PK_BODY_fault_bad_wire_c disconnected wire - in a wire with none two loops, the loops do not match PK_BODY_fault_bad_loop_c the start and end vertices of the loop edges in a loop, taking sense into account, do not match up PK_BODY_fault_bad_shells_c two faces sharing an edge are in edge different shells PK_BODY_fault_disjoint_shell_c the faces in a shell are not all shell connected PK_BODY_fault_non_manifold_c non-manifold vertex vertex PK_BODY_fault_no_fault_c success - valid topological body none created Note that faults are checked for in the order given in the above table, and only the first fault found is returned. Thus if a particular fault is returned, it is known that no faults which precede this in the table are present. If an edge is used twice as a child with the same sense PK_BODY_fault_extra_parent_c is returned. If an edge is not used with both senses, PK_BODY_fault_missing_parent_c is returned. If a loop has a mixture of edges and vertices as children PK_BODY_fault_wrong_child_c is returned. If a loop has more than one vertex as children PK_BODY_fault_extra_child_c is returned. If a vertex has edges and loops as parents, PK_BODY_fault_wrong_parent_c is returned. If a vertex has more than loop as parent, PK_BODY_fault_extra_parent_c is returned. If a loop has as children a ring edge (one with zero or one vertices) and another edge, PK_BODY_fault_bad_loop_c is returned.