Here's a quick reminder as we are entering the main upgrading season for the new release of SolidWorks.
For networked licenses you need to ensure that the server is upgraded first. A 2012 License Server will still allow designers to use older versions of SolidWorks, so the server upgrade can happen before the main upgrade process for all the client machines.
Please contact your reseller for further support on this key issue.
Tis the season to be jolly after all, so don't let this ruin the festive mood.