First - do you have the latest version of SubLab installed?

You can find more information on how to get the update here.  

Most error messages can be quickly resolved by updating your software.

.          .          .

If that doesn't work...

Each SubLab license comes with three activation slots, allowing you to installation and activate SubLab on up to three computers at one time.

Once your activation slots are filled, you may encounter the "Serial in use" error message.

But don't worry! Please click the "submit request" button on the top right of this page.

 We'll reset your activation slots right away.

.          .          .