I'm having troubles using the motion tracking tutorial example for Unity. When starting the app I get a toast message "Failed to connect to Tango Service.". I can see the scene, the camera seems to be working in the background (it's complaining if I cover it or am too close to objects), but there's no video overlay or movement in my scene. By looking a little into it: the return value of a function TangoService_connect is -1, corresponding to TANGO_ERROR. According to the Tango documentation: "Returns TANGO_ERROR on failure, or if the camera could not be opened which could be due to cameras being opened by other applications or could be caused by a system error which may require a reboot.". Reboot doesn't help and there seems to be no problem with the camera for any other app but this one. I tried looking into logcat output, but am not sure what exactly to look for and can't find any useful information.
I'm using Tango Core version 1.42 and Unity 5.3.1f1. I'm of course on a Project Tango tablet and its system is up to date.
Here someone seems to have had the same problem, but no solution was found. I tried unchecking "Auto-connect to service" and doing the connection from a script like here, same result. I'm not sure whether any other Tango Manager settings do the trick, I tried different combinations and of course the default ones. Here someone wrote the Unity tutorials had been deprecated, but it's from April while the tutorial website was last changed in June.
I'd be thankful for any ideas.
PS: I had the same problem with Tango Core 1.43. With factory version 1.37 it said "Incompatible version. Update to the latest Tango Core.".
