A pattern correction happened to be while making a Gees Bend quilt. After I got all the strips cut out they weren't going together right. I went on line and looked up the manufacturer and found the pattern correction. Thank goodness it didn't really make any difference what color sequence I put the strips together on this quilt, but it sure was frustrating for a time. Thought I had lost my mind and cut all the widths and lengths of the colors wrong.