![]() ![]() I know that this isn't "the solution" for the model.remove_constraint() performance problem, but it fits well when you need to avoid it. Check if there is a yellow box to the left of the spreadsheet If there is a constraint it will show with a yellow box to the left of the spreadsheet task row. Print 'number_of_relaxations= ' + str(rx.number_of_relaxations) Print mdl.get_solve_status() #infeasible model ![]() The relaxer library is a really powerful tool, and its way much more easier to use rather than making all the relaxations by hand, especially when you have to deal with hierarchies in the constraints.Įxample: from docplex.mp.model import Model I couldn't found any example in the docs (or anywhere else) of the use of the relaxer, so i made one on my own (really simple to understand). to all the constraints i added a priority, and then I used the relaxer library provided by. If ProjectLibre is downloaded from the Sourceforce site listed above logged into a Linux machine, is the downloaded file. (last question its a little out of topic, but its related with the original problem) New and updated version of OpenProj with hundreds of updates/bug fixes. Enter tasks, durations and the predecessors (logic links), when Project will. ¿Is there a way to remove a constraint faster than with model.remove_constraint(str_name_constraint)?¿is there a way to get all the sets in conflict without having to remove/refine_conflict() for each set?¿is there a way to use hierarchy in constraints in order to avoid conflicts between constraints? Hi Kim, To expand a bit, you are advised against entering dates for that reason. Click on Resources at the top menu and you should see the following image: Now go on and add the following resources as in the image, Mr Analyst (typeWork) and 1kg coffee (typeMaterial). However, I wish the user interface was a bit more appealing and intuitive. Model.remove_constraint(constraint.element) Since you got a pretty good idea about how you can handle tasks, break them down and connect them, we can now move on to the resources section of a project. It's hard not to compare ProjectLibre with MS Project because it really does have a lot of the same functionality. If there is a constraint it will show with a yellow box to the left of the spreadsheet task row. ![]() The problem is that, in order to found all the sets of constraints in conflict, I have to remove some of the constraints in conflict using the function model.remove_constraint(constraint.name) and that function takes a long time to execute.Įdit the timings for 135.000 constraints are: model.remove_constraint(constraint.name) Check if there is a yellow box to the left of the spreadsheet. Using the docplex functions ConflictRefiner().refine_conflict(model) im able to found, at least, one set of constraints in conflict. I'm working with CPLEX/ docplex solving an LP problem that has a lot of infeasible constraints, most of the issues in feasibility come from the automated formulation of the model, and its hard to detect a priory the conflicts between constraints. ![]()
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