Why does it say unfortunately android acorn process has stopped??

[AC Question]

I'm trying to delete phone numbers in my contacts and it keeps showing this

 

[B. Diddy]

Welcome to Android Central! The acore error can be tough to troubleshoot, since it can be due to more than one app. There are many threads on this, if you search this forum. Here's one possible solution: http://forums.androidcentral.com/t-...se-android-process-acore-stopped-working.html