Cause
This error occurs if a presentation client attempts to connect to an application server that is running a newer version of JADE and the automatic download process is not supported across those releases.
From JADE 6.3 onwards, the automatic thin client download supports only upgrading the presentation client to the same or the next major release (that is, a JADE 6.2 presentation client can be upgraded from a JADE 6.3 application server but a JADE 6.1 presentation client cannot).
Action
If you want to upgrade the presentation client to an earlier version of JADE, reinstall the JADE thin client software for the required version, or perform the automatic download in stages by connecting to application servers running the next major releases, one after the other. For example, to upgrade from JADE 6.1 to 6.3, first connect the presentation client to a JADE 6.2 application server and then to a JADE 6.1 application server.