That's not much to go on. Could be anything from disease to poor pollination.

Can you send a picture? What's the variety?

Well, I think it's a forensic job @ this point, I think they have all dried up in the husks, but for the future, I would like to know what happened.

From the photo, it appears you allowed it to ripen. If you wanted sweet corn you have to pull it at an early immature stage. That ear looks like it is filled out with kernals, if it is not, then we would need to look at other problems.

the picture is deceiving, its not as big or plump as it appears it the picture. I think I'll pick & open one to photograph.