https://bugs.documentfoundation.org/show_bug.cgi?id=95278
Bug ID: 95278
Summary: Solving for the local maxima by providing limiting
conditions results in an answer, but causes strange
behavior in LibreOffice/Solver.
Product: LibreOffice
Version: 5.0.1.2 release
Hardware: x86-64 (AMD64)
OS: Linux (All)
Status: UNCONFIRMED
Severity: minor
Priority: medium
Component: Calc
Assignee: libreoffice-bugs@lists.freedesktop.org
Reporter: wh...@airmail.cc
Created attachment 119910
--> https://bugs.documentfoundation.org/attachment.cgi?id=119910&action=edit
An example spreadsheet to use for duplication of the error
0) Download the attached example.ods.
0.5) Install nlpsolver if you haven't already.
(http://extensions.openoffice.org/en/project/solver-nonlinear-programming-beta)
1) Summon Solver.
2) Select $B$7 as your target cell.
3) Optimize the result to maximize that cell.
4) Select $B$6 as the cells to change.
5) If we solved now, we'd get the absolute maxima. We want a local maxima
instead, so add in two limiting conditions, one for $B$6 <= 2, and one for $B$6
=> 3.
6) Solve.
7) You can either wait out the 2000 iterations, or stop shortly after starting.
Either way, Solver will have arrived at the answer (Should say 2.90). It should
be noted that $B$6 will be (approximately) equal to $B$11, and $B$7 will be
(approximately) equal to $B$12. This is the answer we want.
8) After hitting OK, Solver will declare that "No solution was found." and
revert the two cells to what they were before Solving.
I don't know if this is an edge case on Solver, or the result of weirdness from
the NLP Solving plugin, but even if Solver couldn't be convinced that this is
the answer I want, it'd be nice to have the "No solution was found." box give
me the option to keep the answers, rather than reverting them with no recourse.
The answer can still be extracted (as you can see), but it requires typing
everything out manually outside of LibreOffice, which is a pain.
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