I managed to modify the communication protocol in the UART Bootloader example project (AN68272) to CAN. Now I`m able to send data to target and to receive responses. But when I send 0x37 command (send Data) I get 0x4 error (data is not in the propper form). I`m using Cyacd to String image tool to transform generated cyacd file in string array. See the picture below (0x3-Message from Host, 0xA message from Target). Any idea why I`m getting this error?