- Copy the .rst file path or open that folder and then close the mechanical.
- Go to the directory where that 0kb file.rst is saved.
- Delete the 0 kB file.rst
- Now open mechanical and run the simulation.
Another option is to copy the Analysis System. As the results are not copied, the file.rst problem is gone. It is a known bug, and it is resolved in the 2023R2 version. With scripting, you can try to use the second option. You can make a copy of the analysis system and apply the second set of loads.