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I am learning to use pyomo parmest. I am trying to recreate the following parameter estimation example. The code that I created is in the following jupyter notebook. IPOPT stops with the message of maximum iterations exceeded when using collocation but solves with finite difference discretization. Since it is suggested that collocation is typically more robust, I would like to know what I might be doing wrong in using the collocation discretization.

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I had originally used number of collocation points in discretization ncp = 4. When I changed ncp = 2, IPOPT ran without issues. The updated ipython notebook is in this location.

notesofdabbler
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