0967bf21_Lotus_Notes_Traveler_8_5_2__Steps_to_Resolve_Error
[Error Number] 38 [Error Message] The sync ended abnormally. HTTP Status code %d. [Notes] The client received an HTTP status error of 415 from the server. This indicates unsupported media and is typically returned when the client compresses the XML package and the server has a problem decoding it. [Steps to Resolve Error] 
Turn off zlib compression on the server.
Lotus Notes Traveler 8.5.2
Steps to Resolve Error