Error -19800: vuser compilation failed is shown in VUGen

hi,

Iam getting the following error:
Error -19800: vuser compilation failed is shown in VUGen
arning: Extension cciext.dll reports error -19800 on call to function ExtPerProcessInitialize [MsgId: MWAR-10485]
Error: Thread Context: Call to service of the driver failed, reason - thread context wasn't initialized on this thread. [MsgId: MERR-10176]

Pls. help to resolve this issue. I am new to loadrunner