I had this issue serveral times using command blocks, even when i was cloning a small area. It also happened once while using the clone command in chat. In this case I was copying only 286 blocks. I took a screenshot of the shown error: https://www.dropbox.com/s/imhtnetytvu2uz9/Screenshot%202015-09-22%2022.58.22.png?dl=0
DIDschl
I had this issue serveral times using command blocks, even when i was cloning a small area. It also happened once while using the clone command in chat. In this case I was copying only 286 blocks. I took a screenshot of the shown error: https://www.dropbox.com/s/imhtnetytvu2uz9/Screenshot%202015-09-22%2022.58.22.png?dl=0