You have to remember that the RDB has the CNTY (set as NET in the case you want) and the channels tie the PRI & DCH to that type, so like Firebird says you need to remove all the BCH in LD 14 first, then you should be able to alter the RDB, I think you actually have to out the DCH and add it back from memory you can't change it, and then add the BCH back in.