My server keeps returning this if I try to connect to it for a second time, after a clean universe I can connect one time.. and the second time it doesnt work anymore, console doesn't show any fancy errors, just the exact same thing as my client says:

" Username sent connection end message, reason: Unhandled error while syncing!"

EDIT: It seems that this is only when the server's gamemode is set to Career

Initialize engine version: 4.3.4f1 (e444f76e01cd)
GfxDevice: creating device client; threaded=1
Direct3D:
Version: Direct3D 9.0c [nvd3dum.dll 9.18.13.3788]
Renderer: NVIDIA GeForce GTX 560 Ti
Vendor: NVIDIA
VRAM: 977 MB (via DXGI)
Caps: Shader=30 DepthRT=1 NativeDepth=1 NativeShadow=1 DF16=0 INTZ=1 RAWZ=0 NULL=1 RESZ=0 SlowINTZ=0
Begin MonoManager ReloadAssembly
Platform assembly: E:\KSPLauncher\KSPLauncher\Launcher_Data\Managed\UnityEngine.dll (this message is harmless)
Loading E:\KSPLauncher\KSPLauncher\Launcher_Data\Managed\UnityEngine.dll into Unity Child Domain
Platform assembly: E:\KSPLauncher\KSPLauncher\Launcher_Data\Managed\Assembly-CSharp-firstpass.dll (this message is harmless)
Loading E:\KSPLauncher\KSPLauncher\Launcher_Data\Managed\Assembly-CSharp-firstpass.dll into Unity Child Domain
Platform assembly: E:\KSPLauncher\KSPLauncher\Launcher_Data\Managed\Assembly-CSharp.dll (this message is harmless)
Loading E:\KSPLauncher\KSPLauncher\Launcher_Data\Managed\Assembly-CSharp.dll into Unity Child Domain

• Completed reload, in 0.035 seconds
  Initializing input.

Input initialized.

desktop: 1920x1080 60Hz; virtual: 3840x1080 at 0,0
Platform assembly: E:\KSPLauncher\KSPLauncher\Launcher_Data\Managed\System.dll (this message is harmless)
Platform assembly: E:\KSPLauncher\KSPLauncher\Launcher_Data\Managed\System.Xml.dll (this message is harmless)
Platform assembly: E:\KSPLauncher\KSPLauncher\Launcher_Data\Managed\Mono.Security.dll (this message is harmless)
Is steam? False

(Filename: C:/BuildAgent/work/d3d49558e4d408f4/artifacts/StandalonePlayerGenerated/UnityEngineDebug.cpp Line: 53)

Local BuildID: 276

(Filename: C:/BuildAgent/work/d3d49558e4d408f4/artifacts/StandalonePlayerGenerated/UnityEngineDebug.cpp Line: 53)

Platform assembly: E:\KSPLauncher\KSPLauncher\Launcher_Data\Managed\System.Core.dll (this message is harmless)
SettingsPath: E:/KSPLauncher/KSPLauncher/Launcher_Data../settings.cfg

(Filename: C:/BuildAgent/work/d3d49558e4d408f4/artifacts/StandalonePlayerGenerated/UnityEngineDebug.cpp Line: 53)

BakPath: E:/KSPLauncher/KSPLauncher/Launcher_Data\settings.cfg.bak

(Filename: C:/BuildAgent/work/d3d49558e4d408f4/artifacts/StandalonePlayerGenerated/UnityEngineDebug.cpp Line: 53)

Backup exists

(Filename: C:/BuildAgent/work/d3d49558e4d408f4/artifacts/StandalonePlayerGenerated/UnityEngineDebug.cpp Line: 53)

It exists

(Filename: C:/BuildAgent/work/d3d49558e4d408f4/artifacts/StandalonePlayerGenerated/UnityEngineDebug.cpp Line: 53)

Hi, from check patcher,,,,,,,,,,,,,,,,,,,,,

(Filename: C:/BuildAgent/work/d3d49558e4d408f4/artifacts/StandalonePlayerGenerated/UnityEngineDebug.cpp Line: 53)

Checking patcher at https://kerbalspaceprogram.com/kspstore/dp/patcher/index.php

(Filename: C:/BuildAgent/work/d3d49558e4d408f4/artifacts/StandalonePlayerGenerated/UnityEngineDebug.cpp Line: 53)

Windows 7 Service Pack 1 (6.1.7601) 64bit

(Filename: C:/BuildAgent/work/d3d49558e4d408f4/artifacts/StandalonePlayerGenerated/UnityEngineDebug.cpp Line: 53)

ExecPath = E:/KSPLauncher/KSPLauncher/Launcher_Data../KSP_x64.exe

(Filename: C:/BuildAgent/work/d3d49558e4d408f4/artifacts/StandalonePlayerGenerated/UnityEngineDebug.cpp Line: 53)

E5150 path: E:/KSPLauncher/KSPLauncher/Launcher_Data\E5150.cfg.bak

(Filename: C:/BuildAgent/work/d3d49558e4d408f4/artifacts/StandalonePlayerGenerated/UnityEngineDebug.cpp Line: 53)

Loading Settings...

(Filename: C:/BuildAgent/work/d3d49558e4d408f4/artifacts/StandalonePlayerGenerated/UnityEngineDebug.cpp Line: 53)

Last BuildID: 278

(Filename: C:/BuildAgent/work/d3d49558e4d408f4/artifacts/StandalonePlayerGenerated/UnityEngineDebug.cpp Line: 53)

[Updater] Server reports that Patcher has MD5 of 2de496fe5b6e2f26eff5f816fde5c8be

(Filename: C:/BuildAgent/work/d3d49558e4d408f4/artifacts/StandalonePlayerGenerated/UnityEngineDebug.cpp Line: 53)

[Updater] Our own copy of E:/KSPLauncher/KSPLauncher/Launcher_Data/../Patcher.exe has MD5 of 2de496fe5b6e2f26eff5f816fde5c8be

(Filename: C:/BuildAgent/work/d3d49558e4d408f4/artifacts/StandalonePlayerGenerated/UnityEngineDebug.cpp Line: 53)

ALLOW UPDATE? True

(Filename: C:/BuildAgent/work/d3d49558e4d408f4/artifacts/StandalonePlayerGenerated/UnityEngineDebug.cpp Line: 53)

UnloadTime: 0.486897 ms
Unloading 4 Unused Serialized files (Serialized files now loaded: 0 / Dirty serialized files: 0)

Unloading 32 unused Assets to reduce memory usage. Loaded Objects now: 955.
Total: 3.517857 ms (FindLiveObjects: 0.062484 ms CreateObjectMapping: 0.029883 ms MarkObjects: 2.540439 ms DeleteObjects: 0.147910 ms)

Can I have the KSP.log or outpot_log.txt file from your KSP?

I'm sorry but it does not look like you connected to a server? And are you sure DMP is installed/is correctly installed?

@RockyTV Is there a case where one could get this error without having installed DMP? 😕

@oldmud0 I didn't quite understand your question, but the log @sme4gle listed shows me that DMP is not installed on his KSP.

Uhm, can you pastebin it? It makes it a lot easier!

http://pastebin.com/qLGumM8p here you go

I'll post a printscreen this afternoon, since i'm pretty sure I have installed it... Because I can connect to other servers and stuff.. Lol

By the looks of it, this is from KSP/KSP_Launcher/output_log.txt - We'll need KSP/KSP_Data/output_log.txt.

Oh whoops, totaly forgot about this :'D and I meanwhile reinstalled my windows for various reasons.. so you can close this ticket.