I am starting to build a 1.3 image, and taking the usual look around for things that would get lost. SerialPort>>openPort: appears to address named ports, but it looks like it will miss failures. What I did for 1.1 is capture the result of the primitives and raise an error if it is nil. Any interest? As an aside, does anyone know the state of serial ports on Linux? With Cog? I have been having good luck with native ports using Andreas' Windows VM. I have not done as well on my Linux laptop, but I can't tell whether that is related to Linux, the Linux VM, or (my lead theory) USB-serial converters. I need to get Ubuntu on a box with native ports and put it where I can stress test serial I/O; it has been a elusive combination, but I will get there. Bill