Host Id mismatch error

[Raajay]

I am using Gurobi for solving MIP's using the Java API's. This is on a linux ubuntu 14.04 machine. 

Everything works fine most of the time, but at times I hit the following error:

gurobi.GRBException: HostID mismatch (licensed to 2f5f4e41, hostid is 0) - license file '/users/raajay86/gurobi.lic'

Any idea what is happening here? I have an academic license. 

Thanks

Raajay

[Greg Glockner]

> gurobi.GRBException: HostID mismatch (licensed to 2f5f4e41, hostid is 0) - license file '/users/raajay86/gurobi.lic'

hostid 0 means your computer has no network adaptor. To get a Gurobi license on Linux, it requires a network adaptor.

[Greg Glockner]

Sorry, clarification:

> On Feb 13, 2016, at 6:27 AM, Greg Glockner <gloc...@gurobi.com> wrote:
>
>> gurobi.GRBException: HostID mismatch (licensed to 2f5f4e41, hostid is 0) - license file '/users/raajay86/gurobi.lic'
>
> hostid 0 means your computer has no network adaptor.

A Gurobi license on Linux requires a network adaptor.

[Raajay]

I do have a network adaptor. Note that this error is not thrown always.

"grbgetkey" works fine, and I am able to use Gurobi.

Only when the number of times I invoke the optimization becomes very high, I get an error. 

Raajay

[Greg Glockner]

Are you running on a laptop or virtual machine?

[Raajay]

Running on a physical machine, not a VM.

Raajay

On Sat, Feb 13, 2016 at 5:42 PM, Greg Glockner <gloc...@gurobi.com> wrote:

Are you running on a laptop or virtual machine?

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[Marco Fondi]

Hi. Is this issue been solved somehow? I am experiencing the very same problem with gurobi 650 on a debian physical machine. This error is not thrown always but only when the number of times I invoke the optimization becomes high.  "grbgetkey" works fine too, btw.

thanks in advance for your kind assistance.

marco.

[Marco Fondi]

sorry, forgot to specify I have an academic license.

[sedbo...@gmail.com]

same problem with Gurobi 65 using FuzzyDL  , after i had reinstalled windows with the same adapter of course , this problem  alaways appears....i tried grbgetkey but always the same problem :HostId mismatch 

i got the keyfile from gurobisite but it seems it works only with the old HostID

now how can i change the current HostID 

thnaks

[Daniel Espinoza]

Sedbo,

Do you mean that the problem happens after running gurobi for a while, or that after you reinstalled the system you got a different HostID?

If the latter, you can always get a new license for the machine.

Best

Daniel

[Amir Meshkati]

Hello everyone,

I have the same pronlem here. I use Gurobi on my Laptop with Ubuntu 16. Operating System. During the last 2 weaks, everything was fine and I was working with this great Solver. 

But today suddenly it stopped working! My licence is till 2018 vaild.
I get the following error:

GurobiError: HostID mismatch (licensed to [...]) license file '/home/amir/gurobi.lic

What should I do?

Best regards.

Amir

[Daniel Espinoza]

Hi Amir,

Maybe your primary network adapter changed? maybe you where connected in a different form? that will change the machine ID. If the change is permanent, you can request a new license.

Best,

Daniel