I really hate to bring up this old post since it was like 2 years ago but I wanted to share the solution to the problem I was having just in case it might help someone. At the time I was using a older version of Yawcam so this might not apply to the latest version, as of my writing this is 0.6.2.
Problem: Yawcam would not start. I would see a the splash screen then program would close.
log error EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x61014a80, pid=3112, tid=0x000039b4
bunch of other crap.
Solution:
Replaced dsj.dll in the YawCam folder
Replaced dsj.jar in the YawCam\lib folder
I downloaded them from here http://www.humatic.de/htools/dsj.htm
