I have a sanding program using Robotiq's Copilot URCAP. My polyscope is the latest 3.13.1. I use Dash server to control the robot from a PC HMI, and I have several Socket calls to communicate with the PC HMI to transfer some parameters for the sanding paths, like force, speed, part frame sizes, etc. I have made sure that the sockets are closed properly every time. But, I can only run the the program once, meaning the program can keep working fine in a loop until I stop. Once it stops, everything on the teach pendant locks up. Manual move arrows don't response, I/O don't response, "OFF" button on "Initialize Robot" screen don't response, etc. If I restart the robot, the robot seems working again. But once I play any program (it does not actually play, it will just grey out the play button for couple seconds, and do nothing), it will lock up again . I would have to reflash the Robot USB drive to a working backup image. Please see the video link below: https://drive.google.com/open?id=17jjJ0HXu2-dl_FIKE7-QQoXmD2AsKjkuThank you for reading this. If you have seen similar issue and figured it out, please let me know what you did. Thank you!!!