Unfortunately DMService has stopped message

[Andy847]

I've had a few times now when I've gotten this message, but have no clue what it means. I looked on the internet and can't seem to find what it's in regards to. It shows up after a call it seems like most of the time and then disappears on it's own. Nothing seems wrong with the phone, just not sure if it's something I should worry about. Anyone know what app this is or why I'm getting it? Thanks