can't update to lollipop topic

I have stock ROM v4.4.4...
Today morning I got ota lollipop update notificaton from motorola..
I downloaded the update and installed it... At the middle of installation got error message showing android logo and "error!".. Then it rebooted and then got a message as " sorry error while updating your moto e. No changes were made"...
So please anyone help me ...