Not enough input arguments. Matrix must be square. Right hand side must be a column vector. Input tol may not be achievable by BICGSTABL\n Try to use a bigger tolerance Too many input arguments. Right hand side must be a column vector of length {0,number,integer} to match the coefficient matrix. Input tol is bigger than 1 \n Try to use a smaller tolerance Preconditioner must be a square matrix of size {0,number,integer} to match the problem size. Initial guess must be a column vector of length {0,number,integer} to match the problem size.