Hi Hammed,
It is difficult to see the model clearly from the attached picture, but based on the two error messages (from Mux and zero-order-hold) it seems that the input dimensions to the Mux block are not what the model is expecting. In turn the output error from the mux block might be causing dimension error in Zero-Order-Hold block.
- Review the input and dimensions of Mux and verify the configuration according to the number of input elements.
- Ensure that the output from the Mux block matches this expected dimension.
- Place Signal specification blocks at Mux to ensure expected functionality (by specifying attributes).
Refer to signal specification block: www.mathworks.com/help/simulink/slref/signalspecification.html
