Recently I have been unable to use Revit 2012 or 2013 for new or existing work because of problems related to creating surfaces such as topo, floor, roofs. If say I want to add a topo surface to my project I am able to enter the points and complete the sketch but when I click on the green check mark nothing seems to register. If I leave the modify tab and then go back after doing any number of other tasks the green check mark is always there for the topo surface. If I click on the check mark a second time the application crashes. I have updated both versions of Revit and updated my graphics drivers. I am running windows 7 on a 64 bit machine. Any help or suggestions would be greatly appreciate as I have a ton of work that needs to be done ASAP/
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