Error while running

After picking up a few OpenGL lessons, I have no problem compiling and running all the programs and managed to produce some 3D stuff. But today, all of a sudden, I encounter errors while executing the codes. The following shows the error message in Console :

<hwcExecuteStatusWinFifo>:Invalid fifoTypegd error

FYI, I did not have problem compiling the codes. The errors appeared only when I tried to execute. Also, I encountered the same thing when executing Java codes.

I wish you can help me out with this one.

Thank you very much

Siong Jong Hang