Chapter 4: Downgrade AMRs and EM2100s to run with Legacy Solution Software 9. Then click on the Upload File button. The filename should appear next to the Choose File button. Once the upload is complete, the AMR will run as an MSS 4.X unit. 10. Reconnect to the AMR using the SNG Web UI. 11. In the SNG Software tab, confirm that the desired version of MSS software is installed. The AMR is now ready to connect to the Fleet Manager (EM2100 or EM1100), and for pro- gramming using MobilePlanner. 20569-063 Rev. A Fleet Operations Workspace Core Migration Guide 25