Hi Ryan: On 10/21/08 you sent me an improved version of Modbus.cbx that doesn't require Lookout process restart after Modbus locks up. It has been working flawlessly! However, I also have older systems with Lookout 4.5.1 and 5.1, which have the same issues, but the updated driver is incompatible with those versions. Can you provide updated Modbus.cbx objects for those versions of Lookout? THANKS! -John