Hi Hong Shen - does the process run on a virtual machine when you run via the scheduler? And if so, have you been connecting to the virtual machine via RDP protocol? RDP is not a good tool for BP virtual machines, the desktop UI of the VM only exists while you are connected and is destroyed when you disconnect. A BP process can continue to run without the desktop UI, but any operation such as mouse click, keystroke, activate or screenshot will no longer function.