This error mostly appears when you add mods with data parameters they don't own. I've been doing research on the internet and found out that you'll have to do this in order to fix the problem:
- Go to %appdata%/.minecraft
- Click 'config'
- Click 'forge.cfg'
Turn these two lines
Code:
# Set this to true to remove any Entity that throws an error in its update method instead of closing the server and reporting a crash log. BE WARNED THIS COULD SCREW UP EVERYTHING USE SPARINGLY WE ARE NOT RESPONSIBLE FOR DAMAGES.
B:removeErroringEntities=false
# Set this to true to remove any TileEntity that throws an error in its update method instead of closing the server and reporting a crash log. BE WARNED THIS COULD SCREW UP EVERYTHING USE SPARINGLY WE ARE NOT RESPONSIBLE FOR DAMAGES.
B:removeErroringTileEntities=false
To
Code:
# Set this to true to remove any Entity that throws an error in its update method instead of closing the server and reporting a crash log. BE WARNED THIS COULD SCREW UP EVERYTHING USE SPARINGLY WE ARE NOT RESPONSIBLE FOR DAMAGES.
B:removeErroringEntities=true
# Set this to true to remove any TileEntity that throws an error in its update method instead of closing the server and reporting a crash log. BE WARNED THIS COULD SCREW UP EVERYTHING USE SPARINGLY WE ARE NOT RESPONSIBLE FOR DAMAGES.
B:removeErroringTileEntities=true
This should fix your problem.