Reshmi Raghavan
Ansys Employee

Please note that the files once solved in 2023 version will not be compatible with the lower version.

If the original file was from a lower version (2022R2 or lower) and then simulated using 2023R1 a back up folder would be created (with a copy of the older version file) automatically in the main folder. The back up file can be used to simulate in the older version.