How To Fix The "Book too large!" Error

The "Book too large!" error message.

“Book too large!” is an error message that appears when attempting to use .dupe on a Paper server.

This error message appears because the glitch behind .dupe cannot be used on Paper servers. .dupe must be used on non-Paper servers only.

How to fix

.dupe is permanently patched on Paper servers. The only fix is to use .dupe on a server that doesn't run Paper.

  1. Press F3 to open the debug screen.
  2. Check the type of server in the top left corner.
  3. Realize you are connected to a “Paper” server, which will never support .dupe.
  4. Leave the server.
  5. Connect to a different server that is compatible with .dupe.
  6. Duplicate items without any problems.
Pressing F3 shows the type of server in the top-left corner.
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