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RTOS/TMDXICE110: Program halts when UDP message is empty

Part Number: TMDXICE110

Tool/software: TI-RTOS

Hi.

I found situation as the end of the BIOS operation when trying to process an empty message on the UDP. For sending, I use the program Packet Sender. The debuging device is a TMDXICE110.  The programm is NIMU_ICSS_BasicExample_iceAMIC110_wSoCLib_armExampleproject. For UDP I use dtask_udp_echo created by  DaemonNew.

When ASCII and HEX lines is empty and I push button 'send', the program is halted. 

If the ASCII and HEX lines are not empty the exchange works well.

What do you think, what could be the problem. If someone accidentally sends me an empty package, it will break the work of the device and it will hang. I do not know deeply the design of the internal code of the libraries, at what level should I look for this problem?