Home › Forums › Unity SDK › meet "InsufficientLicenseException: The license is insufficient. API error code" › Reply To: meet "InsufficientLicenseException: The license is insufficient. API error code"
Hi @chysun2000, and thanks for your query. In order to use the Tobii Pro SDK with the 4C Tracker, you will need to purchase a special analytical use licence to do so which you can read more about @ https://analyticaluse.tobii.com/
However, if your intention is simply to use Unity Engine with the 4C for interaction purposes, you can use the Tobii Unity For Desktop API which is designed to operate freely with this consumer-level eye tracker.
Please try it out @ https://developer.tobii.com/tobii-unity-sdk/ and let us know how you get on. Best Wishes.