Minecraft - Error code: 4 Server error message: I/O error

System Information

Field Value
Operating System Windows - Windows 11 Home on x86_64
Product AMP ‘Decadeus’ v2.4.6.0 (Mainline)
Virtualization None
Application Minecraft
Module MinecraftModule
Running in Container No
Current State Stopped


import an existing Minecraft server into AMP

Problem Description


Generic error (server should report error description).
Error code: 4
Server error message: I/O error

Most common causes for error code 4 are:

  • Rename file to pre-existing file name.
  • Create a folder that already exists.
  • Moving an external file to another file system (HDD).
  • Upload a file to a full file system (HDD).
  • Exceeding a user’s disk limit.

Reproduction Steps

  • Zip server
  • use WinSCP and connect to AMP
  • Go into Filemanager
  • Drag & drop the zip into the server

Try the Development build. It has some changes in that are supposed to address this issue.

It seems to still happen, Yet Drag & Dropping the Zip file without e.g WinSCP works without an issue.

also If i get the I/O error i still have option for Help, repeat, or skip and skip all, if i choose skip it does upload some file’s, it seems to have an issue with yml files that have Nothing in them but sometimes it did work.

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