Problem World data doesn't seem to be updating.

[Shade_Drezin]

Hey all, made this account because I'm tired of ripping through the internet.
The problem is that my players cant make permanent edits to the world. They build something, it vanishes after a relog. We are on the FTB Departed pack. Any help will be appreciated.

EDIT: This keeps showing in the console [19:21:03] [Server thread/WARN]: The save is being accessed from another location, aborting

 

[Henry Link]

My guess is your antivirus is real time scanning the files because of all of the updates. Try to find the exclusions list in your AV software and put the minecraft folder in that list.