Control parameters
When using mmxnlp, getparam and setparam are extended to additionally provide access to all the control and problem parameters of the Xpress NonLinear SLP solver. The module also provides the following controls of its own:
| XNLP_AUTOELIM |
When set to true, Mosel uses the model's semantics to break down nonlinear formulas and feed the information to the solver for nonlinear eliminations and to detect network structures in the model.
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| XNLP_LOADASNL |
When set to true, quadratic expressions will be treated as being of general nonlinear type. If they are known to be non-convex, the overhead of attempting to treat the expression as convex initially is avoided.
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| XNLP_LOADNAMES |
When set to true, names from the Mosel file will be passed to the underlying solver to improve the readability of messages it generates. This is an alias for XPRS_LOADNAMES.
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| XNLP_NLPSTATUS |
The solution status of the problem. For a detailed description of this value, please see the documentation for the XSLP_NLPSTATUS attribute in the Xpress NonLinear Reference Manual.
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| XNLP_SOLVER |
Solver selection when available.
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| XNLP_VERBOSE |
When set to true, informative messages from any underlying nonlinear solver will be displayed. This is an alias for XPRS_VERBOSE.
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