I'm having trouble using the Jacobian command for predefined vectors. I have defined several 3x1 matrices, concatenated them to a 12x1 matrix, then when I'm taking the Jacobian I get the following error:

Error, invalid input: VectorCalculus:-Jacobian expects its 1st argument, f, to be of type {Vector(algebraic), list(algebraic)}, but received Matrix(10, 1, {(1, 1) = v[x], (2, 1)...

Can anyone tell me what I'm doing wrong here?

Thanks so much in advance!