# Gurobi does not display log
**URL:** https://discourse.julialang.org/t/gurobi-does-not-display-log/114442
**Category:** Optimization (Mathematical)
**Tags:** gurobi, convex-optimization
**Created:** [May 19, 2024, 1:39am UTC](https://discourse.julialang.org/t/gurobi-does-not-display-log/114442 "2024-05-19T01:39:36Z")
**Posts on this page:** 8
**Page:** 1
### Author:  [@CaG21](https://discourse.julialang.org/u/CaG21)
#### Post date: [May 19, 2024, 1:39am UTC](https://discourse.julialang.org/t/gurobi-does-not-display-log/114442/1 "2024-05-19T01:39:36Z")
I am using Convex.jl in conjuction with Gurobi in a Jupyter notebook to solve a convex programming problem. Everything works but Gurobi is not displaying its log to the console in “realtime”, but it displays everything at once only at the end of the optimization. I tried to “force” the logging (even though it should be enabled by the default options), inizializing the optimizer with
`opt = MOI.OptimizerWithAttributes(() -> Gurobi.Optimizer(GUROBI_ENV), "DisplayInterval" => 1, "OutputFlag" => 1, "LogToConsole" => 1)`
but it does not work.
Is there a way to do it?
PS: I tried also with Mosek and CPLEX and in those cases everything works smoothly.
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### Author:  [@mtanneau](https://discourse.julialang.org/u/mtanneau)
#### Post date: [May 19, 2024, 10:06pm UTC](https://discourse.julialang.org/t/gurobi-does-not-display-log/114442/2 "2024-05-19T22:06:23Z")
I have also seen this behavior, specifically with Gurobi. I believe this occurs because Gurobi’s log is buffered before being displayed. I do not know how to control this, nor whether it’s possible to do so.
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### Author:  [@CaG21](https://discourse.julialang.org/u/CaG21)
#### Post date: [May 19, 2024, 10:14pm UTC](https://discourse.julialang.org/t/gurobi-does-not-display-log/114442/3 "2024-05-19T22:14:04Z")
Actually, I tried to run the same code in the REPL and it works smoothly. So it seems a problem of Gurobi and Jupyter.
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### Author:  [@jd-foster](https://discourse.julialang.org/u/jd-foster)
#### Post date: [May 19, 2024, 10:26pm UTC](https://discourse.julialang.org/t/gurobi-does-not-display-log/114442/4 "2024-05-19T22:26:03Z")
You could try using the Logging standard library, e.g.
> [@Suppressing location information for @info in Jupyter notebook](https://discourse.julialang.org/t/suppressing-location-information-for-info-in-jupyter-notebook/90260/2):
>
> You can get this behaviour (similar to the REPL) by calling using Logging global\_logger(ConsoleLogger()) sometime before you execute @info.
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### Author:  [@CaG21](https://discourse.julialang.org/u/CaG21)
#### Post date: [May 20, 2024, 1:13am UTC](https://discourse.julialang.org/t/gurobi-does-not-display-log/114442/5 "2024-05-20T01:13:30Z")
Thank you for this suggestion. I tried, but it does not work
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### Author:  [@torressa](https://discourse.julialang.org/u/torressa)
#### Post date: [May 20, 2024, 7:44am UTC](https://discourse.julialang.org/t/gurobi-does-not-display-log/114442/6 "2024-05-20T07:44:31Z")
How long does Gurobi take? If it’s less than a 1s then it looks like as you say. For a longer running problem it looks as expected (e.g. I tried [Convex.jl/docs/src/examples/general\_examples/robust\_approx\_fitting.jl](https://github.com/jump-dev/Convex.jl/blob/v0.15.4/docs/examples_literate/general_examples/robust_approx_fitting.jl) with `m = 2000; n = 1000;`)
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### Author:  [@ericphanson](https://discourse.julialang.org/u/ericphanson)
#### Post date: [May 20, 2024, 2:59pm UTC](https://discourse.julialang.org/t/gurobi-does-not-display-log/114442/7 "2024-05-20T14:59:15Z")
just to note that version of the example is for v0.16.0 of Convex.jl which is about to be released; the version for the latest existing release v0.15.4 is [here](https://github.com/jump-dev/Convex.jl/blob/v0.15.4/docs/examples_literate/general_examples/robust_approx_fitting.jl) (and in rendered form [here](https://jump.dev/Convex.jl/stable/examples/general_examples/robust_approx_fitting/)).
So if anyone tries the example and gets an error about e.g. `silent` not being accepted by `solve!`, try that v0.15.4 version of the example instead, or `] add Convex#master` to update to the not-yet-released v0.16 of Convex.jl.
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### Author:  [@CaG21](https://discourse.julialang.org/u/CaG21)
#### Post date: [May 20, 2024, 5:20pm UTC](https://discourse.julialang.org/t/gurobi-does-not-display-log/114442/8 "2024-05-20T17:20:47Z")
It takes way more then 1s (in fact, it requires between 2 and 3 minutes)