Assist focus acting weird

I have all my toons assist with /assist focus, /cast whatever. It works for everyone, except for Chain Lightning on one toon. Everyone else will cast it except him. And what's really weird is that he follows all the other commands off focus, like follow and /cast lightning bolt, heal, etc.

But when I go for Chain Lightning, I get "You have no target" and "Unknown unit". So I end up with 4 shamans casting CL, and one shaman just along for the ride :(

Edit: I thought this might be a server problem, but it's been going on for a few days now. Also, that one shaman will SOMETIMES cast CL, but most of the time he doesn't.

Two things:

1) Go in there and make DAMN sure you didn't typo something in that one guy's macro (I've done it. Don't argue. Cut&paste macros into notepad and compare them that way; you can't always tell wtf is wrong in WoW's retarded fonts.)
2) Target something with your main and wait 5 seconds, then cast CL. If it works with an artificial delay, you're running into the "ping-pong" delay and there's not much you can do about this but wait a second or two until the packets catch up.

If you've tried both of the above and still no joy, try typing each part of your macro into the command bar of your alt and see if it works individually. This is the only real way to debug which part of it isn't working. Would also help if you pasted your macro in here straight from your macros_cache.txt file.

Double checking typo's was the first thing I did, it's all good there. If I target with the main and wait, it still doesn't work, even after a minute. What does work though, is that I have everyone cast lightning bolt first. Then the shaman in question can cast chain lightning like normal. If I try CL to start off, he won't respond, and I get those error messages.

My macro from that file is

/assist focus
/cast chain lightning

I know focus is working because he does everything else off of it, i.e. follow, heal, regular lightning bolt. Just no chain lightning unless i cast another spell on the mob first. Just bizarre :(

I figured it out. I don't know what was in there that wasn't supposed to be, but I created a new macro, put the command in there, and it works. Exact same commands. Why it works now, I have no idea. Appreciate the help though!

Sometimes it'll get a wierd invisible character in there and corrupt the thing.

Glad you got it working!