Note1: This was not the start of a new frame The bytes received was not the start of a new frame should be 0x55 0xFF Note2: The Header CRC was incorrect thus source and destination addresses may be invalid An incorrect CRC indicates that the message bytes were corrupted, extra bytes were inserted or bytes were dropped. Thus, one or more bytes cant be trusted. A consequence of this is that what we have identified as the frame type, the source or the desitination a ddress cannot be relied on since the byte sequences that contain this information may be corrupt. Note3: The data CRC was incorrect and the data are invalid An incorrect data CRC indicates that some of the data packet messages were corrupted, extra bytes were inserted or bytes were dropped. Thus the content of the data frame cannot be trusted. Note4: Data Legnth was greater than the max data buffer size The length of the message was greater than 501 octets, the maximum buffer size as specified in the BacNet specification.