You are doing it wrong guys. First of all you have to create an interface in the MMOCore and implement it's functions in the drop list system. In short: when an NPC happen to have bad drop, the MMOCore should stop the packet communication for all players. Additionally you can include System.exit(-1); to grand boss drops.
Here you can download the latest clean Lineage II Interlude client. Title mostly says what does it contains. It is the original Interlude client with the latest updates from NCSOFT made before Kamael was released. Also it contains a Windows 10 compatibility fix. System Protocol: 746 MIRROR 1: https://drive.google.com/file/d/0B7roVVCYr_0nZnhsUjhDUW1VMzg/view?usp=sharing MIRROR 2: https://mega.nz/#!5xFgCTwZ!dJSLc9Xf8J90bv2V4WQPmggCtxo5EGs_ytHR9-VJMRw Enjoy. PS: If you already have a fully-updated Interlude client with the already shared Windows 10 Fix - then ignore this share please. Thanks.