# FSI licence question

This discussion was created from comments split from: Student Product Release Policy.

• Member

Ansys Student can do a two way FSI coupled system?

I do a two way FSI simulation like the oscillation plate tutorial but after some coupled iterations show some errors...But I don't think they caused by License.

CFX output as follow:

----------------------------------------------------------------------

COEFFICIENT LOOP ITERATION =39000       CPU SECONDS = 1.835E+04

----------------------------------------------------------------------

|    Equation    | Rate | RMS Res | Max Res | Linear Solution |

+----------------------+------+---------+---------+------------------+

| U-Mom-Bulk      | 0.95 | 9.2E-03 | 6.9E-01 |    7.1E-04 OK|

| V-Mom-Bulk      | 0.00 | 0.0E+00 | 0.0E+00 |    0.0E+00 OK|

| W-Mom-Bulk      | 1.16 | 7.1E-02 | 4.7E+00 |    7.0E-04 OK|

| P-Vol        | 0.97 | 1.3E-04 | 3.7E-03 | 9.9 2.9E-03 OK|

+----------------------+------+---------+---------+------------------+

| Mass-Water      | 1.00 | 2.2E-03 | 6.3E-02 | 10.6 3.4E-08 OK|

+----------------------+------+---------+---------+------------------+

======================================================================

Convergence Warnings Summary

======================================================================

+-------------------------+------------------------------------------+

|   Equation Class   |   Solve Location    | Number of  |

|             |              | Convergence |

|             |              | Failures   |

+-------------------------+------------------------------------------+

| Momentum and Mass    | DEFAULT          |    1   |

| Volume Fractions    | DEFAULT          |    1   |

+-------------------------+---------------------------+--------------+

+--------------------------------------------------------------------+

| ERROR #001100279 has occurred in subroutine ErrAction.       |

| Message:                              |

| A System Coupling error occurred while the request "AssignToken"  |

| was being served.                         |

|                                  |

|                                  |

|                                  |

|                                  |

+--------------------------------------------------------------------+

+--------------------------------------------------------------------+

|          Writing crash recovery file           |

+--------------------------------------------------------------------+

+--------------------------------------------------------------------+

| ERROR #001100279 has occurred in subroutine ErrAction.       |

| Message:                              |

| Stopped in routine CP_ServeUntil                  |

|                                  |

|                                  |

|                                  |

|                                  |

|                                  |

+--------------------------------------------------------------------+

+--------------------------------------------------------------------+

|        An error has occurred in cfx5solve:         |

|                                  |

| The ANSYS CFX solver exited with return code 1.  No results file |

| has been created.                         |

+--------------------------------------------------------------------+

End of solution stage.

+--------------------------------------------------------------------+

| The following transient and backup files written by the ANSYS CFX |

| solver have been saved in the directory              |

| E:/Thesis/Elastic-Wall/Elastic                   |

| Wall_pending/dp0_CFX_Solution_1/Fluid Flow CFX_002:        |

|                                  |

| 0_full.trn                             |

+--------------------------------------------------------------------+

+--------------------------------------------------------------------+

|               Warning!               |

|                                  |

| The ANSYS CFX Solver has written a crash recovery file. This file |

| has been saved as E:/Thesis/Elastic-Wall/Elastic          |

| Wall_pending/dp0_CFX_Solution_1/Fluid Flow CFX_002.res.err and may |

| be an aid to diagnosing the problem or restarting the run. More  |

| details should be available in the solver output section of the  |

| output file.                            |

+--------------------------------------------------------------------+

+--------------------------------------------------------------------+

| The following user files have been saved in the directory     |

| E:/Thesis/Elastic-Wall/Elastic                   |

| Wall_pending/dp0_CFX_Solution_1/Fluid Flow CFX_002:        |

|                                  |

| trace                               |

+--------------------------------------------------------------------+

+--------------------------------------------------------------------+

| For CFX runs launched from Workbench, the final locations of    |

| directories and files generated may differ from those shown.    |

+--------------------------------------------------------------------+

This run of the ANSYS CFX Solver has finished.