Has anyone used the PNLSS toolbox (PNLSS_v1_0)?

I've been trying to figure out this toolbox for a while now but I can't get a stable model for my SISO system. The error message is:

% Error using dbalreal
% The system must be asymptotically stable
% Error in new_pnlsslssm (line 93)
% [A,B,C] = dbalreal(A,B,C); % Compute balanced realization

Seemingly even the tutorial code gives this issue and I can't figure out how to get the code to identify a stable model. The data is real world data, and therefore is definitely stable, but the toolbox won't find an asymptotically stable model.

This is a bit of a long-shot but if anyone does have experience with this then any help would be appreciated.

I've attached the folder containing the toolbox for reference

[Ben Cheshire]

Just realised I'm probably not allowed to attach the folder due to licensing issues, the questions still holds though

[Ben Cheshire]

Ok, I've sorted it now.

If anyone is interested though, I had to run the code in MATLAB release 2016b in order to get it working. I don't think there's any forum posts about this toolbox (at least not that I could find) so if you have any questions I might be able to help

[LI WANG]

Hi, can I know how to access this toolbox? Thanks