Question: Yet another problem with optimization - 2

Hello, everyone!

Last day I’ve discovered a strange behavior of the “optimization” tool:

Mostly it copes with the task – but there are cases (the data are the same) when the tool doesn’t return the opt. value: instead it returns the parameter name.
BUT if some of the previous calculations are re-evaluated (and the same input values are received) the “optimization” tools works quite well.

The question is: how to tackle the problem?

P.S. The way to force re-evaluation of previous functions in the body of this procedure (if the optimization failed) doesn’t help: it returns the optimizing parameter name once more.

Windows 8 (64-bit)
Maple 17.00

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