I have a Cincinnati arrow 1000 with the acromatic 2100. Ive been having this problem for a while now. After the machine has been on for a couple hours if I put code into the MDI it tells me that I have a syntax error. Even though I've been using the exact same code in the past. It doesnt matter what is entered. It comes up with te same error. The same code will work fine on the program side. It used to be that if I shut the machine down overnight it would go away. Now it doesn't matter. Any input is greatly appreciated.