Same problem. I’m just going to copy my post from another thread:
Anyone else having problems building 4.3 (switching over from 4.2)? Seems like the Speedtree implementation is the culprit:
I applied the new .zip dependency content. I recreated the project files using GenerateProjectFiles.bat. Settings set to Development Editor and Win 64.
I have used Rebuild All. Three times (with normal builds inbetween).
SpeedTreeCore_Windows_v7.0_VC12_MTDLL64_Static.lib is present.
edit: Right-clicking the speedtree libs and I see they were blocked because they ‘came from a different computer’. I unblocked them. Tried re-building but still no success (‘can’t open inpput file’). Looking up error: http://support.microsoft.com/kb/815645