Error: Cannot propogate bus signal from output 1 to input 5

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Oliver McEnteggart 2012-7-23

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https://ww2.mathworks.cn/matlabcentral/answers/44307-error-cannot-propogate-bus-signal-from-output-1-to-input-5

I keep getting this error when I try to run a simulation with a model reference. The signal is created by a subsystem which then transmits the signal to model reference. I created this signal (bus) in the base workspace using the bus editor so the model reference can see it but I keep getting this error when I run the simulation. I have checked many times to make sure the signal in the bus editor and the real one match up and they do!

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Kaustubha Govind 2012-7-23

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https://ww2.mathworks.cn/matlabcentral/answers/44307-error-cannot-propogate-bus-signal-from-output-1-to-input-5#answer_54336

Have you set the bus object (in the workspace) as the input datatype for the corresponding port inside the referenced model?

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Oliver McEnteggart 2012-7-24

编辑：Oliver McEnteggart 2012-7-24

Hi, the problem was that the structure of the bus in the base workspace didn't always match the order of that from the bus going into the workspace as I didn't realise that the order in which elements are placed in a bus actually mattered.

So now it's all working but is there a way to create a script that loads the base workspace bus whenever I load the test harness?

Thank you for the help

Kaustubha Govind 2012-7-25

Yes, you could program the test harness model's PostLoadFcn callback to run your script that creates/loads the Bus objects. See Model Callbacks for more information.

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