Syntax error in simulink function

Hello, can you help me find the error in this function?

(1/L)*(-R*u(1)+ws*L*u(2)-md*u(3)+Ud)

Answer 1

[Walter Roberson]

There is no obvious syntax error there, but the code would fail if L is a vector (or matrix) or if both L and ws are vectors or matrices when size(ws,2) is not the same as size(L,1)

You might need

(1./L) .* (-R*u(1) + ws .* L * u(2) - md*u(3) +Ud)

[Akylas Strathgakos]

They are simple variables ,thank you for the answer though