I am now using VOF model with dynamic mesh. At first I test it with coarse mesh, it works well. Then I fine the mesh and set autosave every 100 time steps. However, every time Fluent autosave case file, ACCESS VIOLATION error always happens, and the case file can not be totally saved. Despite of this, the computation can continue if I give up autosaving the case file.

What is the reason for this and how to solve, Anyone knows? thanks.

In addition, I use a udf to define the motion, and the mesh motion is what I expected. The problem is that mesh information of each time step can not be write into case file completely (whether or not autosave is used). Error stated above occurs when only a part of case information is written.

To my great surprise, even this error occurs, after I cancel the operation of writing into case file, the computation can continue without any problem. I can autosave data file, but not case file. However, how can I process the data file later without its case file.

I am really confused why the mesh can not be written into case file. Who could help me out?