Error in 'udp/UDP Receive': Received a fractional-length packet for the specified data type.

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Fábio Gonçalves 2018-4-12

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https://ww2.mathworks.cn/matlabcentral/answers/394405-error-in-udp-udp-receive-received-a-fractional-length-packet-for-the-specified-data-type

回答： Michael 2022-6-22

Hi, I need simulink to be able to receive udp data from an external source. I am using the UDP receive block. When the UDP communication is within the model (in localhost), everything works great. But, if I try to receive data from an external source I allways get the error:

Error in 'udp/UDP Receive': Received a fractional-length packet for the specified data type.

Can someone help? Thanks in advance.

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Dominic Romano 2019-5-30

I get same issue. Anyone have an answer?

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Answer 1

Michael 2022-6-22

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https://ww2.mathworks.cn/matlabcentral/answers/394405-error-in-udp-udp-receive-received-a-fractional-length-packet-for-the-specified-data-type#answer_991475

I've had this issue before and it was related to the port already being used by another process. You may want to change you port and/or check to make sure the UDP port isn't already in use.