You need to check that under the ARCamera you have selected the correct dataset to load and activate.

Next, for the Image Target you have to ensure that the correct DataSet and Image Target within it are selected.

Chances are the problem is somewhere here.

N

I found the problem :) We should check the corresponding dataset box in ARCamera prefab. I didnt know that :)

Same happened to me today. I used Image Target from the website and created a trackable with 4 stars. I am using VideoPlayback for unity sample. I am trying to change the image target with mine but app doesnt recognize it. Btw just to check I added 2 picture to image target dataset one of them was the standart stones picture. I added that dataset to Videoplayback sample and choosed my dataset instead of standart stones and chips. After that first I choosed my picture and got no result in recognizing, so I thought maybe my trackable was bad (despite its four stars) I tried stones trackable from my own created dataset. And still no luck. But there is a slight difference between the two pictures. In play mode of unity when it sees the stones picture it says in the bottom "trackable found" but with my other picture nothing happens. I also tried the app on ipad 4 and results were same. 

Can anyone help?

So it's working in Play Mode but not on your device? Have you tried reinstalling your app?

I used an uploaded single image.

I tried with the same images that work great last week with the same app.

I work on unity i test the captation directly with the front webcam.

When i switch with the target i made last week everything is fine...

Thanks for this very quick suport !

Grégory

Nothing has changed. Are you using a Device Database or Cloud Recognition?

Is this with a newly built app, or an existing installed app?

There was a temporary service interruption a few days ago. If you're using Cloud Reco, you might try clearing the data for that app or reinstalling.