Error 1001 when updating Sonos
Error 1001 occurs when a connection cannot be made to one of your Sonos products when starting an update. Below are some common steps you can take to resolve this error.
Check for missing rooms
Before attempting the update again, check the System tab (Rooms tab in the Sonos S1 app) to see if you are missing any rooms. Missing rooms indicates there are some connection issues with your Sonos products. See our article on products missing from the Sonos app for some steps to reconnect those rooms and then try the update again.
Move closer to your WiFi router
If possible, move the device with the Sonos app closer to the router and try the update again.
Reboot your Sonos products
Reboot all of your Sonos products. Once you have rebooted all of your Sonos products, make sure they all show up in the Sonos app and try the update again.