Hi @rakeshkanna91, Okay thanks for the clarification.
Indeed, I can confirm that with the EyeX SDK, the calibration routines are handled by the EyeX Engine entirely and are not available for modification.
The calibration routines should therefore be run first using the Tobii own software and thereafter one may run the game properly.
You can launch the calibration routine within the code directly as shown in the simpler SDK samples included with the package.
I assume you have no issue in running these other samples that call the calibration routine?