Comment 3 for bug 892049

Hello,
  by following your link, there is a statement, that the HPGL file should start mandatory with an "IN" command (=initialize), while my one is starting in advance to the "IN" command with a set of "MG" commands (=message), which will be ignored by the plotter ideally. By removing all leading commands before the "IN" command, a few trial openings or imports works fine.