setting MaxFunEvals in estimate command

I need to fit an ARIMA(7,0,7) model to a set of data (NRV in the code below), however if I don't specify any options, MATLAB stops and says it has reached the maximum number of function evaluations. I tried to set this higher, but MATLAB gives me an error... Anyone have an idea how to fix it? Thanks in advance!

code:

modelNRV = arima(7,0,7);
opt = optimset('MaxFunEvals',5000);
ARMANRV = estimate(modelNRV,NRV(1:timespan),'options',opt);

error:

Index exceeds matrix dimensions.

Error in arima/estimate>linearConstraints (line
1095)
LB(i1:i2) = [-10 ; repmat(-1 + tolerance, nAR +
nMA, 1) ; tolerance(isVarianceConstant)];

Error in arima/estimate (line 755)
     conStruct = linearConstraints(LagsAR,
     LagsSAR, LagsMA, LagsSMA, ...

[Ruben]

or is there a way to set the maximum function evaluations without the optimset command?