how to fix Error in port widths or dimensions?

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Ozan Emre Eren
Ozan Emre Eren 2021-5-14
回答： Shiva Kalyan Diwakaruni 2021-5-24
Hello!
There is a 3x2 matrix in Jac_v input from another subsystem and this is true, but the size of this matrix changes in Matrix Multiply entry [3]. The same problem exists in Matrix Multiply at 4. input. How does it look like this?

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回答（1 个）

Shiva Kalyan Diwakaruni
Hi,
This behavior is due to a different mechanism for "guessing" and propagating signal dimensions in Simulink . This issue can be bypassed by using a Signal Specification block in order to explicitly determine the dimensions of a signal, instead of relying on inheritance.
You can refer to the below link for more information
https://www.mathworks.com/help/simulink/slref/signalspecification.html
Hope it helps

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