Yuyi Zhong
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Latest activity by Yuyi Zhong-
Yuyi Zhong commented,
Hi, Thank you for the latest reply. All the scenarios have the same constraint set, only different objective functions. I am under this impression that as long as they share the same constraint set...
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Yuyi Zhong commented,
Hi, The code snippet looks like, where in the second last row, it gives me "Gurobi error: Unable to retrieve attribute 'ScenNX' with error code 10005. Error obtaining ScenNX 50 for layer 0, neuron ...
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Yuyi Zhong created a post,
DATA_NOT_AVAILABLE error when Retrieving Solutions for Multiple Scenarios
Awaiting user inputHi, I am using gurobi 9.5 and have a multiple-scenarios model where the constraint set among different scenarios are the same, only the objective functions are different. I tried to call GRBoptimiz...
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Yuyi Zhong commented,
Hi, I think I know the reason, I added new constraints to the model and updated the model before scenario 4. Since the base model is modified, scenario 4 returns "GRB_LOADED". I delayed my calling ...
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Yuyi Zhong commented,
Hi, Thanks for your suggestion, but updating to 9.5.0 doesn't really help. I didn't see a button to attach files, how can I share lp and mps files to you? Thanks and Regards, Yuyi
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Yuyi Zhong commented,
I am trying to retrieve the ObjVal for each scenario, but I had "Gurobi error: Unable to retrieve attribute 'ScenNObjVal'" for one of the scenarios. After checking, I find that the model status for...
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Yuyi Zhong commented,
Hi, Thanks, but I am actually solving a multi-scenario model https://www.gurobi.com/documentation/9.0/refman/definition_of_a_multi_scen.html., where a single call to the standard Gurobi optimize me...
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Yuyi Zhong created a post,
Model status returns GRB_LOADED
AnsweredHi, I am running Gurobi 9.0 in the C language. One of the model solving returns me status "GRB_LOADED", meaning that the Model is loaded, but no solution information is available. Do you have any ...
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Yuyi Zhong created a post,
How to solve different objective function at the same time (with the same set of constraints)?
AnsweredHi, I am calling Gurobi 9.0 from C language. I construct a Gurobi model with a certain set of constraints, and I want to maximize/minimize different objective functions with this same set of constr...