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!

Answer 1

[Kaustubha Govind]

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

[Oliver McEnteggart]

Yes I set the bus in the workspace as the input data type for the reference model but I still get the error

[Oliver McEnteggart]

I tried running the simulation without the signal connecting the bus to the reference model and I get an error saying:

The input bus to block 'Actuator/Ep_init_with_adaptive_and_grip_mass/Ep_struct' does not match the bus specified by the bus object 'Ep_struct' on the block dialog. The following errors were detected :

However, when I check the errors that were detected they don't exist and as far as I can tell the signals match up but simulink thinks they don't.

[Kaustubha Govind]

Just to be clear, you set the input datatype on the inport inside the referenced model, and not just at the model boundary in the top-level model?

[Oliver McEnteggart]

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]

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.