Unknown PCL command

There is a huge range of printers supporting different levels of PCL, and some of these make use of obsolete or undocumented PCL commands. There are also a number of obscure or rarely-used commands that have not been implemented in EscapeE. These commands will be ignored, which will not usually cause a problem, but if the appearance is incorrect see Problem reporting for details of how to send RedTitan the file for analysis.