Hi Macbahi,
PGN 65259 is a multipacket message with variable length.
This PGN is available under Bidirectional->TransProtocol_Rx->Parsers, and it is called CI_Parser
To receive and process the message, you'll need three blocks.
1. Req_PGN_Tx: This will be used to request PGN 65259 from the remote device
2. TP_RTS_CTS_Rx: This is used to receive the multipacket messages. It needs to be configured to receive PGN 65259
3. CI_Parser: This block is connected to TP_RTS_CTS_Rx and decodes the message into a nice friendly signal.
There is a small J1939 Example in the update center that shows the CI_Parser, but it is missing the Req_Pgn_Tx function which is needed.
-Matt_Eng