(Moderators: I am not sure if this is the correct forum to raise this rather technical IT issue. Please move if not.) I have just returned from a trip London <-> Berlin using a Sparpreis ticket. I had received an email from email@example.com with a PDF of the ticket attached. When I came to print it before setting off all kinds of things went wrong - only the first few lines were printed or the printer would hang with the "printing document" light on and, on one occasion, the printer switched off! Eventually my son successfully initiated the printing from his office in Stuttgart on my printer in Manchester. As you might gather from this, said son is an IT networking specialist but he had no idea why I couldn't print from the computer adjacent to the printer. Can anyone shed any light on this?