I've gotten different errors, despite reading the "Using Armory on the BCH chain" thread.
Given we're not mind readers... and don't have remote access to your machine, you'll probably want to post your Armory logs (use pastebin.com for this) so we can see what the errors actually are 
Also, the situation with the BCH hardfork that happened 2 weeks ago (May 15th) might be causing some issues with the BCH signer... not a certainty, but a possibility.
I've been patiently waiting to sell this disgusting altcoin for ages.
Honestly, if you just want to dump the BCH, I'd recommend simply exporting your keys from Armory and importing (or sweeping) them into Electron Cash (after moving all your BTC to new wallet/keys of course)... and then you can just transfer the BCH to wherever you want to convert it to BTC/$$$/OtherCoins™ etc.Personally, I believe it will likely take a whole lot less time and be a whole lot less hassle to do it this way than attempt to force Armory into working with BCH.
