int _error; //!< SMESH_ComputeErrorName or anything algo specific
std::string _comment; //!< any text explaining what is wrong in Compute()
std::list<const SMDS_MeshElement*> _badInputElements; //!< to explain COMPERR_BAD_INPUT_MESH
+ const SMDS_Mesh* _mesh; //!< mesh being computed, needed to create SMESH_BadInputElements
volatile bool _computeCanceled; //!< is set to True while computing to stop it
