I was thinking the same thing...signal not being passed to the last fixture. DMX cables are 50 ft. I am going to try a terminator although Chauvet tells me it's not necessary. Worth a try though.
Having 50ft of cable between fixtures shouldn't be a problem. I'd try some short 5ft cables if you have them (even mic cable if you must) just to see if there's a difference - it won't hurt anything. I agree that you might as well try a terminator too. My usual mantra with them is that in 20 years of lighting I have yet to have one repeatably solve a problem on a "lounge level" system where there wasn't a deeper underlying problem going on. Your case might be an exception to this as there's very little else for you to try at this point. Beyond that, without having DMX diagnostic equipment the solutions start becoming more expensive with still no promise of success. Good luck!
