Q&A Forum > > Reply To: Lotus Organizer on Windows 10 – Solved! Start a new discussion February 16, 2021 at 5:43 pm #47863 RCMember @rockychandra GD… did you resolve yr “System Error: (ASWAN:526)Unknown ID” error ? What did you need to do ? I have a windows 8.1. My organizer 6.1 used to work perfectly before and I needed to reinstall it … and since then it does not work. I get the same error. Help !!!