License Delivery maintenance is expected to occur on Saturday, October 19, between 4 and 6 PM CEST. This may cause a short 60-minute outage in which license-related tasks: license key upload, download, update, SSA validation, access to the license pool may not function properly. We apologize for any inconvenience.
Modeling
About Archicad's design tools, element connections, modeling concepts, etc.
Look at this post - same problem... GS says update your graphic card drivers.
By the way, update your profile with a "signature" to report your OS and version of AC, seem mine below. Version numbers are important to pin point why you might be having a particular problem.
