Often electronic scales can be thrown of or give error from being to close to the wall where electricity is running by it. Not saying this is the case but it happens often. My guess is that its somthing simple your over looking. Id call RCBS before sending it back they might beable to trouble shoot it over the phone.
Have you even looked in the instruction booklet to see what that error code stands for and what to do when it comes up? According to the one instruction book I brought up online it says that it stands for out of calibration and you need to exactly follow the instructions for recalibrating it. I can't remember the model it was for, but I think that is probably what yours needs to have done. If you don't have the instructions, you can just do a search for that scale and download the thing onto your computer and go from there. Let us know what you come up with and if that fails I guess you can always call the company if you haven't already..
Let me start by telling you the story of two Johns.
John number one went on a day hike with a couple of friends in the Cascade Mountains about an hour from Seattle. He somehow got separated from his buddies and became lost. John was dressed in casual cloths for a warm weather day hike and had nothing but a lunch with him. He spent three days in those mountains and luckily made it out to tell the story.
John number two, a friend of John number one, was much better prepared when...