A copier problem is a technical issue that can occur when using a photocopier. Common copier problems include misfeeds, JAMS, jamups, and paperjams. A misfeed is when the paper does not feed correctly into the machine, resulting in a blank page or a paper JAM. A JAM is when the paper gets stuck in the machine, preventing it from working properly. A jamup is when the paper gets stuck in the machine and needs to be manually removed. A paperjam is when the paper gets stuck in the machine and needs to be manually removed, but also causes other parts of the machine to malfunction.