need help with state space input error

so i keep getting this error

and i dont know how to fix it, the daiagram is supposed to look like this 100% but i am getting this issue while my friends have it working.

this is the ABCD values;

what do i do?

Answer 1

[Sam Chak]

Hi @Ossama

You have entered the input matrix B as a single column vector, causing a dimension mismatch. Consequently, the state-space block expects only ONE (1) input to be provided. There are two ways to resolve this issue: you can either adjust the input side or the state-space side. However, without seeing the actual differential equation that involves both the Step signal and the Gravitational Acceleration (9.81), there is uncertainty regarding the correctness of the B matrix entry.