In a fracture mechanics analysis of a turbine blade using ansys static structural, unknown error message is displayed. Solution information shows crack front does not have a contiguous set of nodes . Sphere of influence for meshing and sizing option near crack front was used to capture micron level crack. The meshing is successful near crack and displays no error. The error is displayed during simulation. The cracking option used is pre-meshed crack. Slicing the faces and bodies near crack displays the same error. Any help in this regard is highly appreciated.