Prevent Item Duplication with Schematicannon

Understanding the Duplication Bug

The Schematicannon can place blocks that contain items inside them (like containers or blocks with NBT data). Before this fix, you could place these blocks without actually having the required items in your inventory, creating duplicates of valuable materials.

How the Fix Works

With this mod installed, the Schematicannon now validates your inventory before placing any block. This means:

• When the cannon attempts to place a block that holds items, it checks if you actually possess those items
• If you lack the required materials, the block placement fails
• You must stock your inventory with all necessary ingredients before running the schematic

Preparing Your Schematic

1. Load your schematic file into the Schematicannon as normal

2. Before pressing the placement button, gather all items that will be placed inside blocks

3. Store these items in your inventory or in the Schematicannon's input buffer

4. Verify you have sufficient quantities for the entire schematic

5. Start the placement process

This prevents the duplication exploit while maintaining normal Schematicannon functionality for legitimate building projects.