Possibly a timing issue with respect to your TakePicture Block. You might see if you have the same issue if you place part of the code you now have in your Screen.Initialize block into a Button event handler. Just a guess.
Possibly a timing issue with respect to your TakePicture Block. You might see if you have the same issue if you place part of the code you now have in your Screen.Initialize block into a Button event handler. Just a guess.