I'm currently working on simulating a factory flow, but I am having some issues with creating grab activities for workstations. I have one robot cell which can do pick and drop on manufacturing products in the usual way, however, the other workstations (used to place parts on a trolley moving to the robot cell) only have "Product BuildUp" and "Sensor Detection" available (both of whom do not seem to work either).
However, when I run the workstations in an independent setup, they can do "Pick and Drop" which work as expected. Could this possibly be some scoping issue I am unaware off? Picture of the tree structure attached.

The robot switches between three grippers, each of whom work fine while things such as Trolley_Movable do not.

Hope you guys can help!

Best regards, 
Philip