Hello, I have played around with chunk regeneration and I found out that there is a problem with the chunk refreshing method. I simplified the problem to that few lines Code: Chunk chunk = player.getLocation().getChunk(); player.getLocation().getWorld().regenerateChunk(chunk.getX(), chunk.getZ()); player.getLocation().getWorld().refreshChunk(chunk.getX(), chunk.getZ()); The method refreshChunk doesn't work on my side. Tested it with other players. Problems that occurs: very big lags in that chunk minecraft client gets crashed Only solution that I know (at the moment) is: Client needs to disconnecting and reconnecting, if the client not already has crashed... Questions: Alternative solution around? Is there any craftbukkit code around that can be used to send the players the chunks that need to be refreshed? Other solutions? Did I forgot any line of code or are there known problems with chunk refreshing? Ty very much, Seadragon91 Edit: Changed first line of code.