Hi,

Wonder if you guys can help me.

I upgraded from umbraco 7.1.4 to 7.2 recently and I've notice that something wrong happen. It seems I cannot see the document types (under the Settings menu) I had in the database (btw I'm using MYSQL).

I got this following error:

Received an error from the server
Failed to retrieve data for child nodes undefined
The best overloaded method match for 'System.Tuple<bool?,int?>.Tuple(bool?, int?)' has some invalid arguments
Exception Details: 
            Microsoft.CSharp.RuntimeBinder.RuntimeBinderException: The 
best overloaded method match for 
'System.Tuple<bool?,int?>.Tuple(bool?, int?)' has some invalid 
arguments
        
Stacktrace: 
   at System.Dynamic.UpdateDelegates.UpdateAndExecute3[T0,T1,T2,TRet](CallSite site, T0 arg0, T1 arg1, T2 arg2)
   at CallSite.Target(Closure , CallSite , Type , Object , Object )
   at Umbraco.Core.Persistence.Repositories.ContentTypeBaseRepository`1.ContentTypeQueryMapper.<MapContentTypes>b__d6(Object x)
   at System.Linq.Enumerable.WhereSelectListIterator`2.MoveNext()
   at System.Linq.Enumerable.WhereEnumerableIterator`1.MoveNext()
   at System.Linq.Enumerable.<DistinctIterator>d__81`1.MoveNext()
   at System.Linq.Buffer`1..ctor(IEnumerable`1 source)
   at System.Linq.OrderedEnumerable`1.<GetEnumerator>d__0.MoveNext()
   at System.Linq.Buffer`1..ctor(IEnumerable`1 source)
   at System.Linq.Enumerable.ToArray[TSource](IEnumerable`1 source)
   at Umbraco.Core.Persistence.Repositories.ContentTypeBaseRepository`1.ContentTypeQueryMapper.MapContentTypes(Int32[] contentTypeIds, Database db, IDictionary`2& associatedTemplates, IDictionary`2& parentContentTypeIds)
   at Umbraco.Core.Persistence.Repositories.ContentTypeBaseRepository`1.ContentTypeQueryMapper.GetContentTypes[TRepo](Int32[] contentTypeIds, Database db, TRepo contentTypeRepository, ITemplateRepository templateRepository)
   at Umbraco.Core.Persistence.Repositories.ContentTypeRepository.PerformGetAll(Int32[] ids)
   at Umbraco.Core.Persistence.Repositories.RepositoryBase`2.GetAll(TId[] ids)
   at Umbraco.Core.Persistence.Repositories.ContentTypeRepository.PerformGetByQuery(IQuery`1 query)
   at Umbraco.Core.Persistence.Repositories.RepositoryBase`2.GetByQuery(IQuery`1 query)
   at Umbraco.Core.Services.ContentTypeService.GetContentTypeChildren(Int32 id)
   at umbraco.loadNodeTypes.Render(XmlTree& tree)
   at Umbraco.Web.Trees.ApplicationTreeExtensions.TryGetXmlTree(ApplicationTree appTree, String id, FormDataCollection formCollection)
   at Umbraco.Web.Trees.ApplicationTreeExtensions.TryLoadFromLegacyTree(ApplicationTree appTree, String id, FormDataCollection formCollection, UrlHelper urlHelper, String currentSection)
   at Umbraco.Web.Trees.LegacyTreeController.GetTreeNodes(String id, FormDataCollection queryStrings)
   at Umbraco.Web.Trees.TreeControllerBase.GetNodes(String id, FormDataCollection queryStrings)
   at lambda_method(Closure , Object , Object[] )
   at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ActionExecutor.<>c__DisplayClass13.<GetExecutor>b__c(Object instance, Object[] methodParameters)
   at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ActionExecutor.Execute(Object instance, Object[] arguments)
   at System.Threading.Tasks.TaskHelpers.RunSynchronously[TRes at CallSite.Target(Closure , CallSite , Type , Object , Object )

My first idea was that maybe I had some values on the database that might cause this issue. Because the project I'm working on has quite a big database I thought of maybe clean some of the umbraco legacy values. This did not solve the issue. I also notice that even creating new page triggers an error because Umbraco doen't know the type of page that I want to create.

After reading a bit more I came across a blog post that kinda said that Umbraco 7.2 doesn't work with MySQL. Is this true at all?

Well, either way I really need your help to figure this one out. I did the update using Nuget package manager and I didn't got any error. After the fuirst build I got the screen of updating the database and I didn't get an error also. So know I'm a bit confuse towards what could be the issue and where to look to actually try and solve this.

Thank you in advance.

Mário