Error message in meshing
 

Hello Everyone, I am new to ansys, but following the Fluent tutorials. having done everything right and generating mesh according to tutorial guide, the generated mesh couldn't be saved for me to continue. rather an error message was displayed telling me the their was an overlap though the mesh was generated. The particular statement was that "the mesh file exporter does not support overlapping geometry in named selections. what can I do to make progress with the analysis.