Packaging Error: Unknown Cook Failure

Hi, I am trying to package my project but get an error when trying to do so.
Here is the log: link text

I deleted the blueprint that was using variable “NumberOfKeys” and it worked. Thank you for your answer!

The errors both are:

LogBlueprint:Error: [Compiler Interact_obj3] Error The property associated with  NumberOfKeys  could not be found from Source: /Game/Blueprints/Interact_obj3.Interact_obj3

Can you confirm that the blueprint is working? Seems you are using “NumberOfKeys” and something is wrong there.

No Poblem, here to help. If it is resolved can you select my aswer as the correct one? so it shows solved for everyone?