[willyCEP]

Hello everyone,

I am getting problems while iterating in Fluent. Before posting here, I tried to search in the forum for any similar cases, but never figured out any useful thread. So here is my problem : I have in my case 2 velocity-inlet surfaces, with a given velocity profile for each surface. The velocity components at the boundary cells must be imported from an external file.
For that, I wrote a library of 6 udf functions, 3 udfs that reads the x,y and z velocity components for the first surface cells from 3 files, and 3 udfs for the other surface. The library is compiled and loaded in Fluent without any error. For each velocity inlet component on the 2 surfaces, the corresponding udf is attributed.
The iterations start normally but after 83 exact iterations, I get the error :
FLUENT received fatal signal (ACCESS_VIOLATION)
1. Note exact events leading to error.
2. Save case/data under new name.
3. Exit program and restart to continue.
4. Report error to your distributor.
Error Object: ()
I tried to write the case and data files before getting the error, exit Fluent and then reopen the saved case and data files. The simulation continues normally for other 83 iterations. So I must always save the case and data files before 83 successive iterations, reopen Fluent and continue iterations till the convergence. I tried with other similar cases, I got the same problem but with a different successive iterations number. Desperately trying to solve out these "magic numbers" problem, I decided to share it with you.
For any idea or suggestion, I'm ready to hear from you.
Thanks for the assistance