====== How To Fix The "Unknown command: .dupe" Error ======

Are you experiencing the error message ''**<color #f55>[</color><color #fa0>Wurst</color><color #f55>]</color> <color #f55>[</color><color #a00>ERROR</color><color #f55>]</color>** Unknown command: .dupe'' while using the Wurst Client in Minecraft? This article will help you understand why you're running into this error and what you can do to fix it.

It may seem like the Wurst Client's [[cmd:dupe|.dupe command]] is not working, but this is not the case. It is simply a matter of using the right versions of Minecraft and Wurst itself.

===== Why am I experiencing this error? =====

The error message ''**<color #f55>[</color><color #fa0>Wurst</color><color #f55>]</color> <color #f55>[</color><color #a00>ERROR</color><color #f55>]</color>** Unknown command: .dupe'' occurs when you try to use the .dupe command in a Wurst Client version that does not support this command. The .dupe command exists only in Wurst versions for Minecraft 1.16.3 - 1.17. It was patched in Minecraft 1.17.1 and subsequently removed from Wurst Client versions that target Minecraft 1.17.1 and later versions. 

If you try using the .dupe command while playing on Minecraft 1.17.1 or a later version, you will most likely encounter this error message.

===== Which Wurst versions support the .dupe command? =====

The .dupe command is available in Wurst Client versions that target Minecraft [[w>/download/minecraft-1-16-3|1.16.3]], [[w>/download/minecraft-1-16-4|1.16.4]], [[w>/download/minecraft-1-16-5|1.16.5]], and [[w>/download/minecraft-1-17|1.17]]. It also works with a couple of old [[w>/download/minecraft-snapshots|snapshot versions]]. However, due to the command being patched in Minecraft 1.17.1, Wurst Client removed the .dupe command from its versions targeting Minecraft 1.17.1 and later.

That means the .dupe command is still included in the following Wurst Client versions:

^ Wurst Version ^ Minecraft Versions ^ Snapshot Versions ^
| [[update:Wurst 7.14]] | 1.16.5, 1.16.4 | 21w15a, 21w14a, 21w13a, 21w11a, 21w05a/b |
| [[update:Wurst 7.15]] | 1.16.5, 1.16.4, 1.16.3 | 21w19a, 21w18a, 21w17a, 21w16a, 21w15a |
| [[update:Wurst 7.15.1]] | 1.16.5, 1.16.4, 1.16.3 | 21w20a, 21w19a |
| [[update:Wurst 7.15.2]] | 1.17, 1.16.5, 1.16.4, 1.16.3 | 21w20a, 1.17-pre5, 1.17-pre4, 1.17-pre3, 1.17-pre2, 1.17-pre1, 1.17-rc2, 1.17-rc1 |
| [[update:Wurst 7.27.3]] | 1.16.5 | |
| [[update:Wurst 7.31]] | 1.16.5 | |

===== What can I do if I receive the unknown command error? =====

If you encounter the error message ''**<color #f55>[</color><color #fa0>Wurst</color><color #f55>]</color> <color #f55>[</color><color #a00>ERROR</color><color #f55>]</color>** Unknown command: .dupe'', there are a few steps you can take:

  * **Check your Minecraft version:** Ensure that you are playing on Minecraft 1.16.3 - 1.17. The .dupe command will not work on Minecraft 1.17.1 or later versions.
  * **Use a compatible Wurst Client version:** Make sure you are using a Wurst Client version that supports the .dupe command. See the table above for a list of Wurst Client versions you can use.
  * **Downgrade your Minecraft version:** If you want to use the .dupe command and you are using a version of Minecraft that is not compatible, consider downgrading your Minecraft version to 1.16.3 - 1.17. Note that this may affect your ability to play on certain servers and access some features or content introduced in newer versions.

===== Can't you just "un-patch it" and add the dupe back? =====

Unfortunately, no. The removal of the ''.dupe'' command from Wurst Client versions targeting Minecraft 1.17.1 and later was not a simple matter of "un-patching" or tweaking some code to make it work again. Minecraft 1.17.1 fixed the issue that made the ''.dupe''' command possible, addressing the underlying problem that allowed this duplication exploit to work. This means that even if we were to add the ''.dupe'' command back, it would not work as intended on Minecraft 1.17.1 and later versions.

If you want to use the ''.dupe'' command, you will need to use a Wurst Client version targeting Minecraft 1.16.3 - 1.17 (as shown in the table above) and ensure that you are playing on a compatible Minecraft version. Keep in mind that downgrading your Minecraft version may affect your ability to play on certain servers and access some features or content introduced in newer versions.

===== Conclusion =====

The error message ''**<color #f55>[</color><color #fa0>Wurst</color><color #f55>]</color> <color #f55>[</color><color #a00>ERROR</color><color #f55>]</color>** Unknown command: .dupe'' appears when you try to use the .dupe command in a Wurst Client version that does not support it. The .dupe command is only available in Wurst Client versions targeting Minecraft 1.16.3 - 1.17, as it was patched in Minecraft 1.17.1 and removed from later Wurst Client versions. To fix this error, ensure you are using a compatible Minecraft and Wurst Client version or consider downgrading your Minecraft version if necessary.

{{tag>error item_duplication how-to}}