The chosen model structure can only be estimated with a minimum ‌ step input time-delay for each model input. Specify

[fyousefi]

The chosen model structure can only be estimated with a minimum step input time-delay for each model input. Specify the input time-delays via: \n 1) The "Input Delay (nk)" field if the "Initial Estimate" field is None or External. \n 2) Adding leading zeros to the polynomials in the "Initial B(q)" field if the "Initial Estimate" field is "Internal".