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3D object Recognition not working

Vuforia SDK Version: 4.2 - Description with steps to reproduce:

I used this vuforia unity plugging for some months and it worked perfectly for me awsome for 2d image tracking.

But recently I tried to move on to 3D object tracking but it seams tracking is not working.

I used android scanner and scaned a 3D object and test within that app it was perfect but when I follow all the steps on fuforia unity, object is not recognized

Any help on this area would be nice

Thank you

Mobile used to scan and test : HTC M8

- Development OS (Mac OS X, Windows, Linux): Mac OS X, - Mobile OS and Version: 5.1 - Mobile Device Manufacturer and Model name: HTC M8 - Do the Vuforia Sample Applications show the same behavior?: