Why am I getting an error 668: "maximum number of licensed end user redesignations" during activation?:

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When I try to activate, I get the following error message:
ERROR: Error 668
This license has reached the maximum number of licensed end user redesignations (transfers) allowed. Contact the Customer Service Team for more information.
What should I do to activate?

Accepted Answer

MathWorks Support Team
MathWorks Support Team on 12 Feb 2021
Edited: MathWorks Support Team on 12 Feb 2021
This error will occur if attempting to activate when you're not a Licensed End User on the license.
If you are a License Administrator, you can change the User associated with a license in the License Center  of your MathWorks Account.
  • Log in to your MathWorks Account
  • Navigate to the License Center
  • Click on the License Number
  • Switch to the 'Manage Users' tab
  • To add a User, click on the button that reads 'Add User'
  • To remove a User, click on the 'X' icon under Remove User
If you are associated with a license, you can find contact info for your License Administrator in the License Center:1. Go to 
2. Log into your account (if prompted)3. Click on license number4. Click on "Contact Administrators" tabPlease contact support if above doesn't help:
  2 Comments
Walter Roberson
Walter Roberson on 25 Sep 2017
In the license_agreement.txt file, the current version says,
1.1. Individual License Option
(ii) A Named User may install the Programs on up to four (4) different
Computers but may not use a Program on more than two (2) Computers
simultaneously, except that Student and Home Licenses are limited to a
single Computer.
(iii) The Licensee may redesignate the Named User authorized to use a
Program, whether temporarily or not, up to four (4) times in any twelve
(12) month period, except that Student and Home Licenses are not
transferable.
1.2. Designated Computer License Option
(iv) The Licensee may redesignate the Computer, whether temporarily or not,
up to four (4) times in any twelve (12) month period.
1.3. Network Named User License Option
(vi) The Licensee may redesignate the Named Users for a Program, whether
temporarily or not, up to four (4) times in any twelve (12) month period.

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