From sdk-wiki
Gripper may be jammed
If your gripper commands are failing or the electric gripper is stuck in an open or closed position, it may be a result of the gripper firmware being a different version than the robot software.
- The Electric Grippers need to be on the same version as the Robot Software. If attached during a Robot Software Update, the Gripper Firmware will be updated automatically as part of the process. Otherwise, you can always update or check the firmware version through the FSM Tests in the Field Service Menu (FSM).
- See the "Gripper Firmware" page to get information on updating your gripper firmware.