Not enough input arguments. See DDESD. Must have tspan(1) < tspan(end). The first argument, DDEFUN, must be a function handle. Must continue from last point reached. DDEs must return column vectors. Derivative and history vectors have different lengths. Option ''RelTol'' must be a positive scalar. Option ''AbsTol'' must be positive. Solving with NormControl ''on'' requires a scalar AbsTol. Option ''MaxStep'' must be greater than zero. Option ''InitialStep'' must be greater than zero. Option ''Events'' must be a function handle. Option ''OutputFcn'' must be a function handle. The second argument, DELAYS, must be either a function handle or a constant vector. HISTORY must be a constant vector, DDESD solution structure or a function handle. Mixture of single and double data for ''t0'', ''y0'', ''y(d(t0,y0))'', and ''f(t0,y0,ylags)'' in call to DDESD. JUMPS option is not available in DDESD. Solve the problem by restarting at each entry of JUMPS. RelTol has been increased to {0}. Solving {0} requires a scalar AbsTol, or a vector AbsTol of length {1,number,integer} Failure at t={0}. Unable to meet integration tolerances without reducing the step size below the smallest value allowed ({1}) at time t.