Hello, recently I have been having many calls for 49 error codes, on different models, with firmware at latest version. I have done some research and a lot of troubleshooting only to find out the issue was caused by the web browser. I would go into the print que and clear the first job, but before you do that take note of the job/user that the file came from. If it is from a website, then I would suggest showing them how to print from the print hyperlink, instead of the toolbar print icon. When you select the print hyperlink it will convert the website to a printable version, unlike the print icon will send the website as is, causing the error code. Since the printer does not understand script/flash/ or whatever websites have running in the background these days, it will cause it to error out. Just thought I would share my findings, as the firmware may not fix it, and instead of wasting money on a formatter, just clear the first job in the que and everything behind it should print after a reboot of the printer.
Hope this helps......