Changes between Initial Version and Version 1 of Ticket #5206, comment 6


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Timestamp:
2018-11-09T00:26:47Z (6 years ago)
Author:
Francesco Casella

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  • Ticket #5206, comment 6

    initial v1  
    1 I tried the test model with the new nightly in OMEdit, but I am getting lots of "Matrix singular" error messages, and eventually the simulation doesn't start in steady state at all.
     1I tried the test model with the new nightly in OMEdit and the transformational debugger.
    22
    3 I had a look with the debugger, if I use the equation of comment:3, the back-end solves the system of 4 nonlinear equations in the initialization problem using tearing, using {{{u}}} as tearing variable, and solves the problem correctly.
     3If I use the equation of comment:3, the back-end solves the system of 4 nonlinear equations in the initialization problem using tearing, using {{{u}}} as tearing variable, and solves the problem correctly.
    44
    55If I use the original model with the conditional equation, I get a "Matrix singular" warning, then the simulation starts but it's not in steady state, which is quite bad, because it means that a wrong solution of the initialization problem is accepted.