Compiler Errors on client server login database

I am using this tutorial series: Unity3d Tutorial - Server + Client Advanced (MMO) - YouTube

EDIT: I made a forum topic for this problem:
my code can be found here:
http://forum.unity3d.com/threads/168548-HELP!-Compiler-Errors-on-Client-Server-Login-Database

I am just trying to implement the way he creates xml files and read/writes to them for user information in a simple way, that i can then build off of.
I am sitting here scratching my head trying to figure out these 5 errors and 2 warnings i get every time i try to build.

If anyone can please help me it would be greatly appreciated, let me know if you need more information, like what my scripts contain or how i set up the scenes

the error log for my most recent attempt to build:

building target 5
- starting compile Assets/Builds/Server/Server_Data/Managed/Assembly-CSharp.dll, for buildtarget 5
ApplicationException: Unable to find a suitable compiler
  at UnityEditor.Scripting.ScriptCompilers.CreateCompilerInstance (MonoIsland island, Boolean buildingForEditor, BuildTarget targetPlatform) [0x00074] in C:\BuildAgent\work\812c4f5049264fad\Editor\Mono\Scripting\ScriptCompilers.cs:99 
UnityEditor.BuildPipeline:BuildPlayerInternalNoCheck(String[], String, BuildTarget, BuildOptions, Boolean)
UnityEditor.BuildPlayerWindow:BuildPlayerWithDefaultSettings(Boolean, BuildOptions, Boolean) (at C:\BuildAgent\work\812c4f5049264fad\Editor\Mono\BuildPlayerWindow.cs:606)
UnityEditor.BuildPlayerWindow:BuildPlayerWithDefaultSettings(Boolean, BuildOptions) (at C:\BuildAgent\work\812c4f5049264fad\Editor\Mono\BuildPlayerWindow.cs:483)
UnityEditor.BuildPlayerWindow:GUIBuildButtons(Boolean, Boolean, Boolean, BuildPlatform) (at C:\BuildAgent\work\812c4f5049264fad\Editor\Mono\BuildPlayerWindow.cs:1354)
UnityEditor.BuildPlayerWindow:ShowBuildTargetSettings() (at C:\BuildAgent\work\812c4f5049264fad\Editor\Mono\BuildPlayerWindow.cs:1322)
UnityEditor.BuildPlayerWindow:OnGUI() (at C:\BuildAgent\work\812c4f5049264fad\Editor\Mono\BuildPlayerWindow.cs:999)
System.Reflection.MonoMethod:InternalInvoke(Object, Object[], Exception&)
System.Reflection.MonoMethod:Invoke(Object, BindingFlags, Binder, Object[], CultureInfo) (at /Applications/buildAgent/work/3df08680c6f85295/mcs/class/corlib/System.Reflection/MonoMethod.cs:222)
System.Reflection.MethodBase:Invoke(Object, Object[]) (at /Applications/buildAgent/work/3df08680c6f85295/mcs/class/corlib/System.Reflection/MethodBase.cs:115)
UnityEditor.HostView:Invoke(String, Object) (at C:\BuildAgent\work\812c4f5049264fad\Editor\Mono\GUI\DockArea.cs:234)
UnityEditor.HostView:Invoke(String) (at C:\BuildAgent\work\812c4f5049264fad\Editor\Mono\GUI\DockArea.cs:227)
UnityEditor.HostView:OnGUI() (at C:\BuildAgent\work\812c4f5049264fad\Editor\Mono\GUI\DockArea.cs:120)
 
(Filename: C:/BuildAgent/work/812c4f5049264fad/Editor/Mono/Scripting/ScriptCompilers.cs Line: 99)

Failed to create compiler instance
UnityEditor.BuildPipeline:BuildPlayerInternalNoCheck(String[], String, BuildTarget, BuildOptions, Boolean)
UnityEditor.BuildPlayerWindow:BuildPlayerWithDefaultSettings(Boolean, BuildOptions, Boolean) (at C:\BuildAgent\work\812c4f5049264fad\Editor\Mono\BuildPlayerWindow.cs:606)
UnityEditor.BuildPlayerWindow:BuildPlayerWithDefaultSettings(Boolean, BuildOptions) (at C:\BuildAgent\work\812c4f5049264fad\Editor\Mono\BuildPlayerWindow.cs:483)
UnityEditor.BuildPlayerWindow:GUIBuildButtons(Boolean, Boolean, Boolean, BuildPlatform) (at C:\BuildAgent\work\812c4f5049264fad\Editor\Mono\BuildPlayerWindow.cs:1354)
UnityEditor.BuildPlayerWindow:ShowBuildTargetSettings() (at C:\BuildAgent\work\812c4f5049264fad\Editor\Mono\BuildPlayerWindow.cs:1322)
UnityEditor.BuildPlayerWindow:OnGUI() (at C:\BuildAgent\work\812c4f5049264fad\Editor\Mono\BuildPlayerWindow.cs:999)
System.Reflection.MonoMethod:InternalInvoke(Object, Object[], Exception&)
System.Reflection.MonoMethod:Invoke(Object, BindingFlags, Binder, Object[], CultureInfo) (at /Applications/buildAgent/work/3df08680c6f85295/mcs/class/corlib/System.Reflection/MonoMethod.cs:222)
System.Reflection.MethodBase:Invoke(Object, Object[]) (at /Applications/buildAgent/work/3df08680c6f85295/mcs/class/corlib/System.Reflection/MethodBase.cs:115)
UnityEditor.HostView:Invoke(String, Object) (at C:\BuildAgent\work\812c4f5049264fad\Editor\Mono\GUI\DockArea.cs:234)
UnityEditor.HostView:Invoke(String) (at C:\BuildAgent\work\812c4f5049264fad\Editor\Mono\GUI\DockArea.cs:227)
UnityEditor.HostView:OnGUI() (at C:\BuildAgent\work\812c4f5049264fad\Editor\Mono\GUI\DockArea.cs:120)

[C:/BuildAgent/work/812c4f5049264fad/Editor/Src/AssetPipeline/MonoCompile.cpp line 89] 
(Filename: C:/BuildAgent/work/812c4f5049264fad/Editor/Mono/BuildPlayerWindow.cs Line: 606)

- Finished compile Assets/Builds/Server/Server_Data/Managed/Assembly-CSharp.dll
Compilation failed because the compiler couldn't be executed!
 
(Filename:  Line: 84)

Error building Player because scripts had compiler errors
 
(Filename:  Line: -1)

- starting compile Assets/Builds/Server/Server_Data/Managed/Assembly-CSharp.dll, for buildtarget 5
ApplicationException: Unable to find a suitable compiler
  at UnityEditor.Scripting.ScriptCompilers.CreateCompilerInstance (MonoIsland island, Boolean buildingForEditor, BuildTarget targetPlatform) [0x00074] in C:\BuildAgent\work\812c4f5049264fad\Editor\Mono\Scripting\ScriptCompilers.cs:99 
UnityEditor.BuildPipeline:BuildPlayerInternalNoCheck(String[], String, BuildTarget, BuildOptions, Boolean)
UnityEditor.BuildPlayerWindow:BuildPlayerWithDefaultSettings(Boolean, BuildOptions, Boolean) (at C:\BuildAgent\work\812c4f5049264fad\Editor\Mono\BuildPlayerWindow.cs:606)
UnityEditor.BuildPlayerWindow:BuildPlayerWithDefaultSettings(Boolean, BuildOptions) (at C:\BuildAgent\work\812c4f5049264fad\Editor\Mono\BuildPlayerWindow.cs:483)
UnityEditor.BuildPlayerWindow:GUIBuildButtons(Boolean, Boolean, Boolean, BuildPlatform) (at C:\BuildAgent\work\812c4f5049264fad\Editor\Mono\BuildPlayerWindow.cs:1354)
UnityEditor.BuildPlayerWindow:ShowBuildTargetSettings() (at C:\BuildAgent\work\812c4f5049264fad\Editor\Mono\BuildPlayerWindow.cs:1322)
UnityEditor.BuildPlayerWindow:OnGUI() (at C:\BuildAgent\work\812c4f5049264fad\Editor\Mono\BuildPlayerWindow.cs:999)
System.Reflection.MonoMethod:InternalInvoke(Object, Object[], Exception&)
System.Reflection.MonoMethod:Invoke(Object, BindingFlags, Binder, Object[], CultureInfo) (at /Applications/buildAgent/work/3df08680c6f85295/mcs/class/corlib/System.Reflection/MonoMethod.cs:222)
System.Reflection.MethodBase:Invoke(Object, Object[]) (at /Applications/buildAgent/work/3df08680c6f85295/mcs/class/corlib/System.Reflection/MethodBase.cs:115)
UnityEditor.HostView:Invoke(String, Object) (at C:\BuildAgent\work\812c4f5049264fad\Editor\Mono\GUI\DockArea.cs:234)
UnityEditor.HostView:Invoke(String) (at C:\BuildAgent\work\812c4f5049264fad\Editor\Mono\GUI\DockArea.cs:227)
UnityEditor.HostView:OnGUI() (at C:\BuildAgent\work\812c4f5049264fad\Editor\Mono\GUI\DockArea.cs:120)
 
(Filename: C:/BuildAgent/work/812c4f5049264fad/Editor/Mono/Scripting/ScriptCompilers.cs Line: 99)

Failed to create compiler instance
UnityEditor.BuildPipeline:BuildPlayerInternalNoCheck(String[], String, BuildTarget, BuildOptions, Boolean)
UnityEditor.BuildPlayerWindow:BuildPlayerWithDefaultSettings(Boolean, BuildOptions, Boolean) (at C:\BuildAgent\work\812c4f5049264fad\Editor\Mono\BuildPlayerWindow.cs:606)
UnityEditor.BuildPlayerWindow:BuildPlayerWithDefaultSettings(Boolean, BuildOptions) (at C:\BuildAgent\work\812c4f5049264fad\Editor\Mono\BuildPlayerWindow.cs:483)
UnityEditor.BuildPlayerWindow:GUIBuildButtons(Boolean, Boolean, Boolean, BuildPlatform) (at C:\BuildAgent\work\812c4f5049264fad\Editor\Mono\BuildPlayerWindow.cs:1354)
UnityEditor.BuildPlayerWindow:ShowBuildTargetSettings() (at C:\BuildAgent\work\812c4f5049264fad\Editor\Mono\BuildPlayerWindow.cs:1322)
UnityEditor.BuildPlayerWindow:OnGUI() (at C:\BuildAgent\work\812c4f5049264fad\Editor\Mono\BuildPlayerWindow.cs:999)
System.Reflection.MonoMethod:InternalInvoke(Object, Object[], Exception&)
System.Reflection.MonoMethod:Invoke(Object, BindingFlags, Binder, Object[], CultureInfo) (at /Applications/buildAgent/work/3df08680c6f85295/mcs/class/corlib/System.Reflection/MonoMethod.cs:222)
System.Reflection.MethodBase:Invoke(Object, Object[]) (at /Applications/buildAgent/work/3df08680c6f85295/mcs/class/corlib/System.Reflection/MethodBase.cs:115)
UnityEditor.HostView:Invoke(String, Object) (at C:\BuildAgent\work\812c4f5049264fad\Editor\Mono\GUI\DockArea.cs:234)
UnityEditor.HostView:Invoke(String) (at C:\BuildAgent\work\812c4f5049264fad\Editor\Mono\GUI\DockArea.cs:227)
UnityEditor.HostView:OnGUI() (at C:\BuildAgent\work\812c4f5049264fad\Editor\Mono\GUI\DockArea.cs:120)

[C:/BuildAgent/work/812c4f5049264fad/Editor/Src/AssetPipeline/MonoCompile.cpp line 89] 
(Filename: C:/BuildAgent/work/812c4f5049264fad/Editor/Mono/BuildPlayerWindow.cs Line: 606)

- Finished compile Assets/Builds/Server/Server_Data/Managed/Assembly-CSharp.dll
Compilation failed because the compiler couldn't be executed!
 
(Filename:  Line: 84)

Unloading 1 Unused Serialized files (Serialized files now loaded: 0 / Dirty serialized files: 0)

Unloading 4 unused Assets to reduce memory usage. Loaded Objects now: 566. Operation took 32.487001 ms.
System memory in use: 13.2 MB.

*** Cancelled 'Build.Player.WindowsStandalonePlayer' in 0 seconds

I finally got this working thanks to John Bowditch’s answer to this question:

his answer to that question made me think and it turns out that my errors were cause by me trying to build into the assets directory.

I tried building just in the project directory instead, and didnt get any errors :slight_smile:

i built the server, built the client, ran both, and it works perfectly :slight_smile:

so, thank you Unity Answers!! lol