I was going to rush onward and work on ‘on expr go to label list.’ I was sure that I had the stack pointer figured out. I had fudged and got it to sort of work. I decided that I’d better get it right before I went on. I wrote a debug tool which used a parameter list after the debug call. That way it made only the minimum effect on the stack pointer. I’m having a great time and when I do get around to ‘on expr go to label list’ it won’t occasionally break for no apparent reason. I hope.