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Execution errors during model solution are generally
Arithmetic errors or
Problems caused by a presolve.
Arithmetic errors are numerically based and caused by
| • | Improper exponentiation (such as raising a negative value of a variable to a real power), |
| • | Logs or square roots of negative variables, |
| • | Squaring a negative term with **2 (use sqr or a multiplication instead of **2 ) and |
Presolve errors either
| • | Indicate infeasibility or unboundedness |
| • | Result from an overzealous presolve which eliminates the problem for all practical purposes (this generally only occurs with very small problems). |
Solver function evaluation errors
Presolve errors
Solver specific limits
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