Yes, I have (since posting the question) found that the best way to refer to the port would be asrl2::instr instead of using the good ole alias com2. Is it possible to configure somehow, perhaps using MAX to make sure a system will work with com2? I have distributed code to a partner, and they can not make the code work as is, and they are not in computer contact. They could change the alias or whatever is necessary using MAX, but can't receive a new executable.