Federico
Ansys Employee

Hello, 

unfortunately, from the list of files in your screenshot it looks like you don't have Fluent data to restart/continue your simulation. Fluent uses .dat files (.cdat are for post-processing in CFD-Post/Ensight).

If you think that your simulation is prone to crash, I would suggest you set Autosave .cas/.dat files at regular intervals for troubleshooting.