Two-way FSI error
 

I follow all the Tutorial21 steps completely to simulate a Two-way FSI model of a valve of shock absorber, but it CFX can not solve and shows this message:
+--------------------------------------------------------------------+
| ERROR #002100061 has occurred in subroutine SERVE_CLIENTS. |
| Message: |
| The connection between this CFX process and an external process |
| has died unexpectedly. The following error was received: |
| External process : ANSYS |
| Error experienced : Read |
| |
| ** This error is fatal: Terminating ANSYS CFX Solver execution ** |
| Please review the output, error and log files from both the CFX |
| and external processes to determine the cause of the error. |
+--------------------------------------------------------------------+
+--------------------------------------------------------------------+
| An error has occurred in cfx5solve: |
| |
| The ANSYS CFX solver exited with return code 1. No results file |
| has been created


can any body help me with this?

Thanks!

ANSYS crashed, check the *.err-file in the run-directory of the case.