33Error MessagesRoll paper is not securely in contact with roll holder.•Roll printing is selected, but sheets are loaded.•Roll printing is selected.•Sheet printing is selected.•The mail box is full.•The paper is too small.•The paper is too small.•The roll is empty.•This paper cannot be used.•This type of paper is not compatible with HP-GL/2.•Too many jobs for mail box.•Top cover is open.•Unable to detect ink level correctly.•Unknown fi le.•Wrong ink tank.•Wrong maintenance cartridge.•Remaining level of the ink cannot be correctly detected.•Other messagesThese messages do not indicate problems that prevent printer operation. Check the message on the DisplayScreen and take action as necessary. Messages requiring special attention are as follows.Wrong printhead.•