Quicken error OL-220-a is a banking error. This error usually arises when quicken fails to read the information passed from the bank. This quicken error code OL-220-a can be caused if there is a corrupted download of quicken or installation is incomplete. In the case of virus or malware attack also this quicken error OL-220-a can occur. Get more info. call quicken support phone number +1-800-788-5999 Now.