I got error while im running the sample WPF from esri. at first (version 100.1) i am able to run it fine. afterwards in update (100.2) i cant run it anymore. whats the problem here?
Does this happen on a particular PC or all PCs?
Could you try and run "dxdiag", flip to the 'Display' tab. Under the "Drivers" section there should be a list of "Feature Levels". What's the highest and lowest version listed?
I had the same problem on a fresh installed Windows 7 SP1. For the new Version it is required to install the optional Platform Update to get it working (see link). Maybe that helps. The KB is KB2670838.
I've found the reason why i got the error, i think i have disable/uninstall
something important that the direct3d needed to run , i run the arc gis in
my other laptop and it works.