Be sure that you have the samples. Apparently they're not included with the extension package in the Unity store. But the extension version here includes them - https://ar.qualcomm.com/qdevnet/sdk

During the installation process it asks you for a folder to install files to. Five unitypackage files are installed to this folder, the base extension and four samples. Create a new Unity project and import one of the sample packages (e.g. ImageTargets). The imported files will include a scene that is fully set up and ready to deploy to the device.

- Kim

Hi i cant locate the scene file in the installer. Can you help me locate it?

Take a look at the sample applications that come with the installer on this site. They include a TrackableEventHandler script (in the Scripts folder) that you can copy and drag onto your Trackable objects. This script provides basic OnTrackingFound/OnTrackingLost support that you can tailor to your application's needs.

- Kim