Server debugging

Creating Full Dumps

This section will explain how to create useful debugging dumps (called .dmp files) in order to assist with troubleshooting. If you encounter a crash, set up your environment to capture the next time it happens.

NOTE: Creating full dumps is for Windows servers only. This method is currently not supported on Linux.


  1. ProcDump v9.0 or newer.


  1. Make sure your server is running.
  2. Open a command prompt where you extracted procdump to. Use an ELEVATED command prompt for this (should say "Administrator" in the title bar).
  3. Type in the following command:
    procdump64.exe -accepteula -i
    This registers procdump as a debugger to capture certain crashes.
  4. Open task manager, click "Details". Locate the largest FXServer.exe. There should be a "PID" column. Note down the number.
  5. Go back to your command prompt and type in:
    procdump64.exe -accepteula -e -h -mp pidhere
    where pidhere is the number you noted down previously. If you get an error, make sure your PID is correct.
  6. Wait for the server to crash. When it does, it will write a large .dmp file to the procdump folder.
  7. Compress this file (e.g. .zip) and upload it to DropMeFiles or equivalent.
  8. Run the following in your command prompt to unregister the debugger when you are done:
    procdump64.exe -accepteula -u

You can now analyze the dump file (using VS2019+, click 'Debug with Native Only' and load symbols) or supply it to whomever requested it. If you are certain you have found a bug, report it on our forum or in the Discord #server-bugs channel with as much detail as possible. Using OneSync? Please report OneSync bugs here.