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Most seasoned users should know that anti-virus might be a cause for sketches not running.
Just a heads-up, for those using Bitdefender 2017 on Windows, if you encounter problem running sketches that uses P2D or P3D renderer, try disabling Active Threat Control. There is no need to disable Firewall or On-Access Scanning in my case. Strangely, I can run Sketches in JAVA2D just fine. The same disablement goes for exported sketch executables using P2D or P3D. However, I still cannot run the 32-bit executable for whatever reasons even after disabling everything; 64bit one runs fine without Active Threat Control.
Alternatively, you can end task
jogamp_exe_tst<a series of number>.exe and then end task
jogamp_exe_tst<a different series of number>.exe again to run the sketch, be it exported or not.
Hope it helps some new users.