This project cannot be opened in read-write mode because a previous checkin for this project is not complete.
Error: this project cannot be opened in read-write mode because a previous checkin for this project is not complete. Here is the solution: Close Microsoft Project 2013 if it is open Press windows key + R. In the Run dialog, enter the following command: %appdata%\Microsoft\MS Project\15\Cache 4. Delete the all folders in it.