Error [cortex] in FLUENT
 

Hi All,
I'm working on tutorial file i.e engine,in IC engine workbench ANSYS 14.I'm trying to run it for combustion processes by loading UDF. But when i tried to run it by using FLUENT 14. I'm facing this error

Error [cortex] [time 1/8/12 12:50:41]
FLUENT received fatal signal (ACCESS_VIOLATION)
1. Note exact events leading to error.
2. Save case/data under new name.
3. Exit program and restart to continue.
4. Report error to your distributor.

somebody please help me to solve this error.

Thanks
Amit