Quandl have changed their codes :( now they seem to be using the CFTC Id's where are numeric (and can be found in the dump you get from them)
So whereas before for example, GBPUSD was mapped to BP it is now mapped to 096742.
I have gone through the various dumps and tried to map all the symbols I was using, the currency were the easy ones, the wheat, corn etc a little harder to trade down due to variations.
Please let me know if different
PS I also have a number of other variations ie COT Index, COT Momentum, COT MACD - let me know if interested.