: If you are using the immediate previous release (e.g., trying to open 2024 files in 2023), you must have Service Pack 5
: SOLIDWORKS 2024 can save back to 2023 or 2022; SOLIDWORKS 2025 can save back to 2024 or 2023. How to do it File > Save As Save as type dropdown, select the desired previous version. Incompatible Items