I have a Brother SQ9000 and one day I was sewing some seams together and my machine also started pounding. It actually stuttered and stopped and I believe it gave me the same error message. I found that if I changed my foot to one that has a bigger cut out on the bottom that I had no more problem with going over several seams at one time. Don't know if this will help you or not, just telling you what I did to correct this.