This is happening in the editor. Unity 4.6.x
It is happening in multiple Vuforia 4.x projects. Most of which are pretty typical setups. It happens about once every 20 starts so during development I see it all day, every day. Never happened before in 3.x or 2.x
These projects are not deployed (in their upgraded forms) so I have no information about devices. This happens often enough (at my home setup and at my office setup) that I'm sure your devs see it in their own tests. Is it just a harmless thing that happens in the editor, but not on devices?
Repro: Have a Unity project with Vuforia 4.x. Press play. Most of the time, no issue. Sometimes, this happens:
QCAR initialization failed:
Vuforia.DefaultInitializationErrorHandler:SetErrorCode(InitError) (at Assets/Qualcomm Augmented Reality/Scripts/DefaultInitializationErrorHandler.cs:84)
Vuforia.DefaultInitializationErrorHandler:OnQCARInitializationError(InitError) (at Assets/Qualcomm Augmented Reality/Scripts/DefaultInitializationErrorHandler.cs:161)
If this is something that will also happen on devices, then what is some useful code I could put in the DefaultInitializationErrorHandler to make it try again instead of what it does now.