0967bf21_Lotus_Notes_Traveler_8_5_2__Steps_to_Resolve_Error
[Error Number] 23 [Error Message] Invalid data received from the server during sync [Notes] There is a mismatch in the version of SyncML supported by the server and client. [Steps to Resolve Error] 
In theory this should never happen. If it does it is a defect that must be investigated by the development team. There are no workarounds for this one.
Lotus Notes Traveler 8.5.2
Steps to Resolve Error