fluent error
 

Building...
mesh
Cell Centroid is xc 1258.911988 yc 621.728638 zc 104.550951
WARNING: cell 577 of thread 34 has NULL face pointer 3. Clearing partially read grid.

Error: Build Grid: Aborted due to critical error.

Error: Build Grid: Aborted due to critical error.
Error Object: #f


this is the error i got while running a file please help
thank you