# FAQs and troubleshooting¶

A grasp close to the bottom of the load carrier is marked as colliding

Try setting the check_bottom parameter to false as described in Check Bottom.

My gripper has elements that cannot be modeled in the Web GUI

The gripper creator in the Web GUI does not allow modeling rotations in the gripper elements. If it is required to add this kind of elements, the REST-API interface can be used as described in CollisionCheck.