Why do I receive License Manager Error -9?

Question

MathWorks Support Team ，2013-3-5

208
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编辑： MathWorks Support Team ，2023-6-1，13:52

When I try to launch MATLAB, I get one of the following errors:

License checkout failed.
Invalid host. License Manager Error -9

or

License Manager Error -9
Your username does not match the username in the license file.

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Answer 1

MathWorks Support Team 2023-6-1，0:00

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编辑：MathWorks Support Team 2022-10-10

License Manager Error -9 may be caused by various different reasons depending on how MATLAB was installed and activated:

(Individual and Campus-Wide license only) The username in the license file does not match
(Offline Activations) The Host ID in the license file does not match
(Designated Computer Only) MATLAB is already running under a different user account
Machine has a non-static Host ID

(Individual and Campus-Wide licenses only) The username in the license file does not match.

When installing or activating MATLAB, the MathWorks product installer or the activation client attempts to retrieve the username of the user installing MATLAB to activate. If the username was changed or the username retrieved is incorrect, the username in the license file will not match the username of the MATLAB user, and MATLAB issues License Manager Error -9.

To determine the username in the current session:

Windows: Open a command prompt and enter "set username"
Mac: Open a terminal window and type "whoami". Copy that result. You will need that at last step of the activation process.
Linux: Enter “whoami” in a terminal window.

To resolve, verify the username of the MATLAB user, and reactivate MATLAB with the correct username.

Note: Usernames are case sensitive and may not be recognized if they contain spaces.

(Offline Activations) The Host ID in the license file does not match.

When you activate MATLAB manually using the License Center, you must provide the Host ID, and for Individual Licenses, the username, to activate the license to the machine. If the wrong Host ID was used to activate, the Host ID in the license file will not match the Host ID on the machine, and MATLAB issues License Manager Error -9.

To resolve, verify the Host ID of the machine, and, for Individual licenses, the username of the MATLAB user, then reactivate MATLAB.

(Designated Computer Only) MATLAB is already running under a different user account.

With Designated Computer licenses, MATLAB may only be used by one user on one user account on the machine at a time. When MATLAB is started with a Designated Computer license, it attempts to detect any MATLAB processes already running on the machine. If there is a MATLAB process running under a different user account on the same machine, MATLAB issues License Manager Error -9.

To resolve, end all MATLAB processes on different user accounts on the same machine.

Non-static Host ID

For Individual and Designated Computer licenses, the Host ID used to activate MATLAB must not change over time or the Host ID will not match the Host ID in the license file, and MATLAB issues License Manager Error -9. This is common for many virtual machine configurations.

To resolve, configure your system to have a static Host ID, and then reactivate MATLAB.

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Walter Roberson 2021-10-3

A few years ago, we had one student openly discussing how a class of about 30 students got together and bought one MATLAB Student license, put it on USB drive, and passed it around from person to person. That had been going on for several years, apparently. We have also had people ask whether it would be possible to do pretty much the same thing.

We have had people in business discuss that they set up an automated task to reboot the license server every hour, to avoid having to buy more licenses (that is, they had more demand than they had licenses, so they would log everyone out of MATLAB and let there be a rush to get access to the now-freed licenses.)

We have had people ask how to reduce the license "idle timeout" as low as two minutes, to avoid having to buy more licenses (very high demand for licenses compared to the number they were willing to pay for.)

On other sites, I have seen people who crack MATLAB licenses and actively encourage people to use the cracked licenses because they believe that Mathworks is effectively "stealing" from the world by charging anything for licenses.

Not long ago, I had a discussion with a student who was of the opinion that because going to university is expensive, and some professors required MATLAB, that Mathworks was ripping students off by charging anything for MATLAB. The students choose to take those courses; the professors choose to require MATLAB, but apparently Mathworks is to blame for not providing everything for free.

But, hey, it's Mathwork's fault for not trusting the users, right?

Walter Roberson 2022-8-8

@Ismael Rodriguez Sesma

See https://www.mathworks.com/matlabcentral/answers/259627-how-do-i-activate-matlab-or-other-mathworks-products-without-an-internet-connection#answer_202773

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Answer 2

Dandan Zhang 2016-3-12

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Note: It's your Windows User Name rather than Microsoft Account Name.

You can determine your Windows username as follows:

1.While sitting at the host computer with press and hold the Windows key and press the letter R on your keyboard.
2.The Run box will appear.
3.In the box, type cmd and press Enter. The command prompt window will appear.
4.Type echo %username% and press Enter. (there is a space between echo and %username%)
5.Your current username will be displayed.

Reference: http://answers.microsoft.com/en-us/windows/forum/windows_vista-security/where-can-i-find-windows-username-and-password/e9954cb0-fb5a-451e-a833-c7dfa48d1662?auth=1

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Walter Roberson 2021-8-29

@Anamika Acharya

Windows-R . When it brings up the small box to type in a command, use the command

cmd

This will cause a full cmd.exe to be launched. When that comes up, at the (Windows) command window, enter the command

echo %username%

The echo does not go into the MATLAB command window; it goes into the Windows command window.

(You can bring up Powershell instead of cmd if you prefer.)

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Answer 3

Scott Ruffner 2017-2-25

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编辑：Scott Ruffner 2017-2-25

I was able to fix the error on my MacBook Pro with the advise above from Scott on the MathWorks Installation & Licensing Support team. I've added a few tips and step by step clarifications for others that may have the same issue.

I was receiving the -9 error. I'm running OS X Yosemite 10.10.5

It seems that you need to know which user on your Mac you are using. To find this out open a terminal window and type "whoami". Copy that result. You will need that at last step of the activation process.

I installed MATLAB in the /Applications folder.

In the terminal window go to wherever you installed MATLAB and find the bin sub-directory. For me this was /Applications/MATLAB_R2016b.app/bin

In the terminal I ran the activation script again by typing "./activate_matlab.sh"

Then I went through the steps "Login to MathWorks" [email/password] >> Next Selected the pre-selected license. >> Next Provide a user name/Login Name: (Paste the user name that you copied when you ran whoami above.)

Then open a new finder window go to Applications and try to run MATLAB_R2016b. It opened this time without errors hope this helps.

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Answer 4

Michael 2014-9-6

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编辑：Michael 2014-9-6

Note for Linux users: when I installed MATLAB on my Manjaro OS, I was required to have 'root' as my username, rather than my actual username.

The solution to this (if you're using a terminal, which is the only way I can access MATLAB), is to open MATLAB as 'root' by entering 'sudo su' (which changes you to root), and then typing 'matlab'.

P.S. The '' marks on words and phrases like 'root', 'sudo su' and 'matlab' are written in this post just to highlight the specific terms and commands. Quotes ('') should not be included when inputting commands into the Terminal.

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Luis Ignacio Gómez-Jordana Martín 2019-1-12

It work mate. I love you. You save my night, going to sleep finally XD

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Answer 5

Miguel Angel Benavides Morales 2020-6-4

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Para usuarios de windows 10 Home single language: Presionar la tecla windows, buscar Matlab, en la parte inferior debajo de la pestaña aplicaciones debe aparecer Activate MATLAB. Luego ingresar con usuario y contraseña, darle activar licencia y dejar el nombre del usuarios como aparece (por cambiar ese nombre al momento de la instalación o cambiar el nombre de usuario o de usuario en el pc es que aparece el error), luego seguir los pasos de activador y listo.

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Answer 6

Andrew Janke 2019-10-3

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Ouch, dude. That's not a great user experience. I got this same problem when I upgraded my iMac to a newer hardware version. Props to you for the "Troubleshoot" button bringing up this (relevant, correct) answer, but seems like the license transfer process could be made easier, especially for the case of restoring a computer from backup to new hardware.