Steve Bagdon <[log in to unmask]> writes: >Has anyone upgraded directly from 4.0 to 5.5 on a 918RX. Is it possible? >Aside from 3rd party software issues, is this an accident waiting to happen? We went directly from 4.0 to 5.5 on our 948 with no problems at all. I believe it is a supported move (by the RC and the 5.5 Communicator. Good luck. Jim Phillips Manager of Information Systems E-Mail: [log in to unmask] Therm-O-Link, Inc. Phone: (330) 527-2124 P. O. Box 285 Fax: (330) 527-2123 Garrettsville, Ohio 44231