====== How To Fix The "Book too large!" Error ======

{{cmd:dupe:book_too_large.webp?500x300|The "Book too large!" error message.}}

"Book too large!" is an error message that appears when attempting to use [[cmd:.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.

  - Press F3 to open the debug screen.
  - Check the type of server in the top left corner.
  - Realize you are connected to a "Paper" server, which will never support ''.dupe''.
  - Leave the server.
  - Connect to a different server that is [[cmd:dupe#Compatibility|compatible with .dupe]].
  - Duplicate items without any problems.

[{{cmd:dupe:paper_server.webp?400|Pressing F3 shows the type of server in the top-left corner.}}]

{{tag>error item_duplication how-to}}