Problem in reading .cas file
 

I got a request from my senior investigator.

He did some jobs using fluent, and asked me if I can convert the fluent mesh to OpenFOAM mesh, and read the result file of .cas file.

I succeeded in the conversion, but whenever I tried to read the .cas file via paraview, following message came up and stopped me there.

Warning: In /home/kitware/Dashboards/MyTests/NightlyMaster/ParaViewSuperbuild-Release/paraview/src/paraview/VTK/IO/Geometry/vtkFLUENTReader.cxx, line 423
vtkFLUENTReader (0x49106b0): Unable to open dat file.

Can anyone recognize what is the problem here and fix it please..?