Covariance matrix estimate unreliable. Not stored.

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Hello!
I'm working with the Systems Identification Toolbox. we are trying to estimate, using the PEM function.
I am receiving the warning : 'Covariance matrix estimate unreliable. Not stored.'
I would very much like to see the Covariance matrix... How should I start to troubleshoot this?
Thankyou!
  3 个评论
vineet vajpayee
vineet vajpayee 2017-3-22
编辑:vineet vajpayee 2017-3-22
Try to change the order of the estimated model.
Jan
Jan 2017-3-22
编辑:Jan 2017-3-22
[Moved from asnwer section] Mehdi wrote:
Geoff,
My problem is exactly what I wrote. I have 2 input, 3 output and 8 state.

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