During transmission over the satellite link, the data packet may be truncated (cut short) due to signal degradation, atmospheric interference, or a bit error rate (BER) that exceeds the correction threshold. The terminal reads the header expecting a specific byte count (Length Indicator) but receives a payload that is physically shorter than declared.
Look for declarations like:
Maybe "avp14m" is a specific APV profile. I'll search for "APV profile 14M". relevant.
Update the master controller or diagnostic software to the same revision level.