Why do I receive the error "License Manager Error -10"?

Why do I receive the error (?):

License Manager Error -10

Thank you.

Answer 1

[Walter Roberson]

http://www.mathworks.com/matlabcentral/answers/93260-why-do-i-get-license-manager-error-10

[Karin]

Thanks - I was a confused because I was getting license expiration even though I had just bought the toolbox. It turns out I was still using the R2015a version but the toolbox is "attached" to the R2015b version.