RackPick vanishes while Running the Model

Question

I am trying to pick (retrieve) the pallet from storage using RackPick but when i run the model Rackpick vanishes. You can see the links to the model.

userAa59 · Answer

To expand on @Yashars comment: You likely either accidentally ticked the "Ignore" box or (even more likely) toggled the "Visible" switch:

Make sure to not ignore the block and toggle it visible.