My a920 black ink cartridge only lasted a month, printed about 200 pages, and I then started refilling!  Have only refilled the color cartridge twice in 11 mos. compared to 8-10  times for the black.  What is the error message you are getting?  Many times I have been able to solve printer problems by going to control panel & to my printer and discarding all print jobs and startiing over.  By the way when a new/refilled crtridge is installed you will be asked if it is new or old.  I always say the cartridge is new; this seems to reset the ink monitoring system.  Another possibliity is that the cartridge contacts/tip is clogged and a soak in hot tap water 1/4" deep for 5-25 minutes will disolve theis situation.