There are some differences in the Tetin file format at Release 14.0, particularly with respect to the added parameter related to curves and surfaces. This parameter is introduced because of changes to AutoVT in ANSYS Workbench and can be introduced when the model comes through ANSYS Workbench, including with the Workbench CAD interfaces.

You can use the File > Save Geometry As Version... > Version 13 File option to make sure the Tetin file can be read back into the older version of ANSYS ICEM CFD.