This printed the test page ok. No "Manual Feed or Continuable Error".
BUT
The activity light kept flashing. This indicates the printer is still processing data. So it seems that all is not completely well. However at least I didn't have to press a button to get the page out of the printer and the activity light eventually stopped flashing.
Just tried
lpr -o raw /usr/share/ cups/data/ testprint. ps
This printed the test page ok. No "Manual Feed or Continuable Error".
BUT
The activity light kept flashing. This indicates the printer is still processing data. So it seems that all is not completely well. However at least I didn't have to press a button to get the page out of the printer and the activity light eventually stopped flashing.