Respuesta a "Error says paper jam, but there is not. What could cause this?"My epson wp610 had a phantom paper jam - ck'd every answer after I installed a new CIS ink system and could not find a solution that worked. Finally, someone gave me a clue in these answers, took out cis, pushed air thru each ink nozzle in unit, then reinstalled cis. Worked first time. Something must have been blocking nozzle, I never found any debris. Hopes this helps some one.