Created attachment 170656 [details] File showing entered values in the spreadsheet. I created a very simple non-linear problem (file is attached). Having a few values 16 10 11 10 1 20 1 the goal is to maximize the sum of above values to the power of 2: =SUMPRODUCT(B2:B8,B2:B8) on the condition the sum of those values is not greater than 69 and these are non-negative integers. Linear solver can't do it. Both given NL solvers (Swarm Differential Evolution and Particle Swarm) ignore the condition and the solutions are very large 10^+18 values.
Not reproducible for me with LO 7.2.1.0+ built at home under Ubuntu 20.04 x86-64. Non-linear solvers converge toward 69*69 = 4761 with one value set to almost 69 and the others set to almost zero. Experimental swarm algorithm does not work on this case, but DEPS ans SCO evolutionary algorithms works well. Best regards. JBF
Can you please give step by step instructions on what we should do with the file, so people with no experience with solvers can test it? Set to NEEDINFO. Change back to UNCONFIRMED after you have provided the steps.
Dear piotr, This bug has been in NEEDINFO status with no change for at least 6 months. Please provide the requested information as soon as possible and mark the bug as UNCONFIRMED. Due to regular bug tracker maintenance, if the bug is still in NEEDINFO status with no change in 30 days the QA team will close the bug as INSUFFICIENTDATA due to lack of needed information. For more information about our NEEDINFO policy please read the wiki located here: https://wiki.documentfoundation.org/QA/Bugzilla/Fields/Status/NEEDINFO If you have already provided the requested information, please mark the bug as UNCONFIRMED so that the QA team knows that the bug is ready to be confirmed. Thank you for helping us make LibreOffice even better for everyone! Warm Regards, QA Team MassPing-NeedInfo-Ping
Dear piotr, Please read this message in its entirety before proceeding. Your bug report is being closed as INSUFFICIENTDATA due to inactivity and a lack of information which is needed in order to accurately reproduce and confirm the problem. We encourage you to retest your bug against the latest release. If the issue is still present in the latest stable release, we need the following information (please ignore any that you've already provided): a) Provide details of your system including your operating system and the latest version of LibreOffice that you have confirmed the bug to be present b) Provide easy to reproduce steps – the simpler the better c) Provide any test case(s) which will help us confirm the problem d) Provide screenshots of the problem if you think it might help e) Read all comments and provide any requested information Once all of this is done, please set the bug back to UNCONFIRMED and we will attempt to reproduce the issue. Please do not: a) respond via email b) update the version field in the bug or any of the other details on the top section of our bug tracker Warm Regards, QA Team MassPing-NeedInfo-FollowUp