[ROY4]

Hello everyone
I'm modelling a bubble column. during time independence study, when I decreased the time step from 0.05 to 0.025, after about 3 days of simulation, my run has stopped with the below error:
----------------------------------------------------------------------
COEFFICIENT LOOP ITERATION = 4 CPU SECONDS = 7.741E+05

An error has occurred in cfx5solve: |
| |
| The ANSYS CFX solver could not be started, or exited with return |
| code 255: . 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:\Abolfazli\Test 3-0.025 |
| s\Transient\25spargertransient_002: |
| |
| 9800.trn, 9600.trn, 9400.trn, 9200.trn, 9000.trn, 8800.trn, |
| 8600.trn, 8400.trn, 8200.trn, 8000.trn, 7800.trn, 7600.trn, |
| 7400.trn, 7200.trn, 7000.trn, 6800.trn, 6600.trn, 6400.trn, |
| 6200.trn, 6000.trn, 5800.trn, 5600.trn, 5400.trn, 5200.trn, |
| 5000.trn, 28200.trn, 28000.trn, 27800.trn, 27600.trn, 27400.trn, |
| 27200.trn, 27000.trn, 26800.trn, 26600.trn, 26400.trn, 26200.trn, |
| 26000.trn, 25800.trn, 25600.trn, 25400.trn, 25200.trn, 25000.trn, |
| 24800.trn, 24600.trn, 24400.trn, 24200.trn, 24000.trn, 23800.trn, |
| 23600.trn, 23400.trn, 23200.trn, 23000.trn, 22800.trn, 22600.trn, |
| 22400.trn, 22200.trn, 22000.trn, 21800.trn, 21600.trn, 21400.trn, |
| 21200.trn, 21000.trn, 20800.trn, 20600.trn, 20400.trn, 20200.trn, |
| 20000.trn, 19800.trn, 19600.trn, 19400.trn, 19200.trn, 19000.trn, |
| 18800.trn, 18600.trn, 18400.trn, 18200.trn, 18000.trn, 17800.trn, |
| 17600.trn, 17400.trn, 17200.trn, 17000.trn, 16800.trn, 16600.trn, |
| 16400.trn, 16200.trn, 16000.trn, 15800.trn, 15600.trn, 15400.trn, |
| 15200.trn, 15000.trn, 14800.trn, 14600.trn, 14400.trn, 14200.trn, |
| 14000.trn, 13800.trn, 13600.trn, 13400.trn, 13200.trn, 13000.trn, |
| 12800.trn, 12600.trn, 12400.trn, 12200.trn, 12000.trn, 11800.trn, |
| 11600.trn, 11400.trn, 11200.trn, 11000.trn, 10800.trn, 10600.trn, |
| 10400.trn, 10200.trn, 10000.trn |
+--------------------------------------------------------------------+


+--------------------------------------------------------------------+
| The following user files have been saved in the directory |
| E:\Abolfazli\Test 3-0.025 s\Transient\25spargertransient_002: |
| |
| pids, mon |
+--------------------------------------------------------------------+


+--------------------------------------------------------------------+
| Warning! |
| |
| After waiting for 60 seconds, 1 solver manager process(es) appear |
| not to have noticed that this run has ended. You may get errors |
| removing some files if they are still open in the solver manager. |
+--------------------------------------------------------------------+


This run of the ANSYS CFX Solver has finished.

Does anyone know what does this 255 error code means?
If it means solution divergence, what can I do to correct it?
the .out file which is created is about 300 Mb. Shall I send it?
by the way can anyone help me to checkout if my setting are all right or not?
If anyone can please let me know to send you my cfx pre settings.
thanks alot