Mrinmoy Bharadwaj
Ansys Employee

Are you trying to open a design in 2023 R1 or 2023R2?
Assuming that the answer to the above question is "yes", this is the answer to that:
Before trying to open the file in the 2023R1 or 2023R2 version, kindly go through the "New 3D Geomerty kernel..." document under the "Help" tab as show below:

This will help you to migrate your project to the new version.


Hope this is helpful.