If it ain't broke....

then why am I messing with it.
I have a perfectly running computer and control system at this time. Well I did.
Every turnout, detection block, indicating lights and buttons get their own number or letter depending on what you are talking about. For the purpose of trouble shooting later it would be nice if things were in a logical order. During the process of designing a system you start out this way and things are added or taken away and this nice order you had becomes somewhat haphazard.
So I decided it would be a good idea to reorder everything to make it sensible again. I got my drawings out and re-numbered or re-lettered what needed to be done. Then I went to the computer with a plan to change everything, so it would come out right the first time. Yeah, when have I ever had that kind of luck. Needless to say, my whole train world turned upside down and nothing worked when turned the computer back on.
I have been at it for two days and I have some of it, but not all working again. I still can't imagine why some turnouts are working backwards from before I had this brilliant idea. I even found a turnout without a tortoise machine. I still can't figure that one out. How could a machine disappear just due to programming.
The good news is, I have a back up of the way it was before I had my brilliant idea. Now it's a matter of pride.

BTW: I did change Tortoise machines around earlier, I just forgot that I hadn't replaced that one.