Unity IAP plugin is installed, but Unity IAP is disabled - error

This how I fix this error .... Double click on red alert will open "PurchasingCheck.cs" codes :

 #if !UNITY_PURCHASING
 #error "Unity IAP plugin is installed, but Unity IAP is not enabled. Please enable Unity IAP in the Services window."
 #endif

1. cut this code + save => unity services tab will reload and work

2. past the code again + save .

i think this is another bug still exist on last version 5.5.2f1

EDIT 2

since this is a known bug i just trying to set how i skip it

1. cut this code + save => unity

2. Assets reimport All
   

3. click services icone

4. past the code again + save .

@nicholasr

Hi Nicholas,

I experienced the same problem (working with version 5.5.2 f1). But bouemama's workaround did not work for me. I had to remove the whole folder UnityPurchasing from the Assets/Plugins folder. After having done that services window in the editor loaded again (which was very important as we use Colleborate). After loading IAP service was toggled off.

I refrain from integrating the IAP plugin again. The problem occurred totally out of the blue. We had integrated the IAP plugin about two weeks ago and until today there were no problems.

What do you recommend? Update to 5.6? Thanks

I have the same problem ... Someone can fix that ? Im trying to relog, exit Unity, relog again and IAP not start.

 TypeLoadException: Could not load type 'LODLightmapScale' from assembly 'UnityEditor, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null'.
 
 FileNotFoundException: Could not load file or assembly 'UnityEngine.Purchasing, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null' or one of its dependencies.
 System.Reflection.MonoMethodInfo.GetMethodInfo (IntPtr handle) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.Reflection/MonoMethod.cs:59)
 System.Reflection.MonoMethod.GetPseudoCustomAttributes () (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.Reflection/MonoMethod.cs:293)
 System.MonoCustomAttrs.GetPseudoCustomAttributes (ICustomAttributeProvider obj, System.Type attributeType) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System/MonoCustomAttrs.cs:78)
 System.MonoCustomAttrs.IsDefined (ICustomAttributeProvider obj, System.Type attributeType, Boolean inherit) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System/MonoCustomAttrs.cs:301)
 System.Reflection.MonoMethod.IsDefined (System.Type attributeType, Boolean inherit) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.Reflection/MonoMethod.cs:274)
 System.Attribute.IsDefined (System.Reflection.MemberInfo element, System.Type attributeType, Boolean inherit) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System/Attribute.cs:326)
 System.Attribute.IsDefined (System.Reflection.MemberInfo element, System.Type attributeType) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System/Attribute.cs:299)
 UnityEditor.EditorAssemblies.ProcessStaticMethodAttributes (System.Type type) (at C:/buildslave/unity/build/Editor/Mono/EditorAssemblies.cs:95)
 UnityEditor.EditorAssemblies.ProcessInitializeOnLoadAttributes () (at C:/buildslave/unity/build/Editor/Mono/EditorAssemblies.cs:158)
 UnityEditor.EditorAssemblies:ProcessInitializeOnLoadAttributes()
 
 Assets/Plugins/UnityPurchasing/script/PurchasingCheck.cs(3,0): error CS1029: #error: '"Unity IAP plugin is installed, but Unity IAP is not enabled. Please enable Unity IAP in the Services window."'
 
 The Unity IAP plugin is installed, but Unity IAP is disabled. Please enable Unity IAP in the Services window.

@bouemama @guimak @MaverickPL I apologize for the frustration. Thank you for sharing the issues and the workaround.

We're planning on addressing the online/offline "sensitivity" generally, for all Unity Services in an upcoming Unity version. We recognize its faults. The work is ongoing so no release date is available yet. A workaround that may also work is to manually copy the UnityEngine.Purchasing.dll into your project (from /Applications/Unity/Unity.app/Contents/UnityExtensions/Unity/UnityPurchasing/ folder), bypassing the automatic copying currently performed by the Services window.

Also we're hopefully helping prevent perma-broken projects by changing the PurchasingCheck code to be a 'warning' in Unity IAP 1.10.1, shipping hopefully this week.

God I hate Unity, I have the same problem, services just crap out for no reason, now I cannot compile, cannot open Services window, NOTHING!