Problems with ARMA model

Working with the arima function from the Econometrics toolbox. When I use an AR or an MA model, no problem. However I get an error message when using an ARMA(1,1) model. The self-contained code is

data = randi([-10 10],1,30)';

model=arima(1,0,1);

result=estimate(model,data)

Running this I receive the error message 'Index exceeds the number of array elements (2).'

[Aman]

Hi Ronald,

I tried running the code, and it worked fine for me. Could you please share the actual code that you are trying to run, as this piece of code is not giving any error?

data = randi([-10 10],1,30)';
model=arima(1,0,1);
result=estimate(model,data)

 
    ARIMA(1,0,1) Model (Gaussian Distribution):
 
                 Value      StandardError    TStatistic      PValue  
                ________    _____________    __________    __________

    Constant     -2.5461        1.8535        -1.3737         0.16954
    AR{1}       -0.90452      0.063244        -14.302      2.1222e-46
    MA{1}        0.82809       0.10344         8.0057      1.1876e-15
    Variance      20.476        5.8193         3.5187      0.00043367

result = 
  arima with properties:

     Description: "ARIMA(1,0,1) Model (Gaussian Distribution)"
      SeriesName: "Y"
    Distribution: Name = "Gaussian"
               P: 1
               D: 0
               Q: 1
        Constant: -2.54611
              AR: {-0.904525} at lag [1]
             SAR: {}
              MA: {0.828095} at lag [1]
             SMA: {}
     Seasonality: 0
            Beta: [1×0]
        Variance: 20.4764