https://community.usa.canon.com/t5/Desktop-Inkjet-Printers/MP640-incorrectly-calculating-ink-levels/m-p/193837#M45485 <P>I get the pop up telling me My ink tanks are empty when in fact they are at half full or better. &nbsp;I tried removing the half full tanks and rein stalling but no use. &nbsp;</P> Mon, 05 Dec 2016 15:03:00 GMT john1115 2016-12-05T15:03:00Z https://community.usa.canon.com/t5/Desktop-Inkjet-Printers/MP640-incorrectly-calculating-ink-levels/m-p/193837#M45485 <P>I get the pop up telling me My ink tanks are empty when in fact they are at half full or better. &nbsp;I tried removing the half full tanks and rein stalling but no use. &nbsp;</P> Mon, 05 Dec 2016 15:03:00 GMT https://community.usa.canon.com/t5/Desktop-Inkjet-Printers/MP640-incorrectly-calculating-ink-levels/m-p/193837#M45485 john1115 2016-12-05T15:03:00Z