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upgrading to vuforia 2.8.7 extention

January 8, 2014 - 1:22pm #3

Hi,

 

just want to make a note that after upgrading cloud recognition stopped working on some internal null pointer exception

NullReferenceException CloudRecoAbstractBehaviour.Start ()

there is no backrtrace at all.

It took me few hours fiddling with everything. Finally found by comparing sample cloud project little by little that new vuforia extention needs some script keep alive attached to camera even it does not define anything there. It just must be present.

I do not know when this was introduced but If this is so required feature now by 2.8 that all cloud reco should die because of it, it should be noted down to migration guide.

S.

upgrading to vuforia 2.8.7 extention

January 8, 2014 - 1:35pm #2

Are you referring to the Keep Alive Behaviour on the ARCamera prefab? - this should have been included w/ the prefab when you imported 2.8.7.

upgrading to vuforia 2.8.7 extention

January 14, 2014 - 12:46am #1

Hi David,

yes that is the script. It may be included in prefab byt if you have existing project wirh non prefab linked AR camera, then upgrade gives this nasty crashing very difficult to find out. it guess it should be threated as optional behaviour or report proper error if it is not possible to have it optional.

 

S.

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