We have an exciting announcement about badges coming in May 2025. Until then, we will temporarily stop issuing new badges for course completions and certifications. However, all completions will be recorded and fulfilled after May 2025.

Ansys Learning Forum › Forums › Installation and Licensing › Ansys Free Student Software › iostream error › Reply To: iostream error

October 1, 2023 at 3:45 pm
SY
Subscriber

 

Maybe this will help others. I did get the same error message but could just fix it by deactivating the usage of CFF-File-Format using the command line 

”file/cff-files? no”. See also: Fluent 2020R1 > Fluent User’s Guide > 3.3.4. Reading and Writing Files in the Legacy Format

 

Context: I had an old simulation with 40 time steps that was simulated using ANSYS Fluent 2020R1 and the results were saved as .cas.gz and .dat.gz . When I tried to extend the calculation for 40 more time steps in a newer Version or even in ANSYS Fluent 2020R1 Fluent tries to use the .cas.h5 and .dat.h5 formats. This can be suppressed with the command above for the present Session only or also for future Sessions via the preferences, see User’s Guide entry above. Now, the extended calculation saves every time step in the old/legacy format, without error messages.

This is also helpful, because I can now use CFD-Post to have it read all time steps and generate Animation sequences from it. The features that Fluent offers are not sufficient in my case.