b__1(TValueEntity x)\r\n at System.Linq.Enumerable.WhereSelectListIterator`2.MoveNext()\r\n at System.Collections.Generic.List`1..ctor(IEnumerable`1 collection)\r\n at System.Linq.Enumerable.ToList[TSource](IEnumerable`1 source)\r\n at Litium.Application.Caching.CacheLoader.<>c__DisplayClass4_0`3.b\_\_0(LitiumDbContext db)\r\n at Litium.Application.Data.DbContextExtension.ExecuteInDbContext[T](IServiceProvider serviceProvider, Func`2 loaderFunc)\r\n at Litium.Application.Caching.CacheLoader.LoadByPrimaryKey[TKey,TValue,TValueEntity](IEnumerable`1 keys, Expression`1 keyEntityProperty)\r\n at Litium.Application.Caching.EntityCache`2.TryLoadItems(IEnumerable`1 keys)\r\n at Litium.Application.Caching.EntityCache`2.Get(IEnumerable`1 key)\r\n--- End of stack trace from previous location where exception was thrown ---\r\n at lambda_method(Closure , Exception )\r\n at Litium.Application.Runtime.ExceptionEnlightenment.PrepareForRethrow(Exception exception)\r\n at Litium.Application.Runtime.ExceptionHelpers.PrepareForRethrow(Exception exception)\r\n at Litium.Application.Caching.EntityCache`2.LoadableCacheItem.SetException(Exception exception)\r\n at Litium.Application.Caching.EntityCache`2.Get(IEnumerable`1 key)\r\n at Litium.Application.Caching.EntityReferenceCacheImpl`3.Get(TKey key)\r\n at Litium.Application.Websites.PageServiceImpl.GetChildPages(Guid parentPageSystemId, Nullable`1 websiteSystemId)\r\n at Litium.Web.Administration.WebApi.Websites.ViewModels.PageTreeViewModel.HasChildrenAvailableResolver.Resolve(Page page, PageTreeViewModel pageModel, Boolean destMember, ResolutionContext context)\r\n at lambda\_method(Closure , Page , PageTreeViewModel , ResolutionContext )",“innerException”:{"$type":“System.Web.Http.HttpError, System.Web.Http”,“message”:“An error has occurred.”,“exceptionMessage”:“Field with name ‘ErrorMessage’ does not match any field definition in area ‘WebsiteArea’.”,“exceptionType”:“Litium.FieldFramework.FieldFrameworkException”,“stackTrace”:" at Litium.Application.AutoMapper.ValueResolvers.FieldDataToFieldDataContainerItemValueReolver`4.Resolve(TDataEntity source, T destination, ICollection`1 sourceMember, FieldContainer destMember, ResolutionContext context)\r\n at lambda\_method(Closure , PageEntity , Page , ResolutionContext )"}}}`
---
### Author:  [@patric.forsgard](https://forum.litium.com/u/patric.forsgard)
#### Post date: [January 23, 2019, 11:10am UTC](https://forum.litium.com/t/not-able-to-open-the-left-tree-which-lists-pages/520/3 "2019-01-23T11:10:02Z")
To be able to help out and debug the issue you have to open a support case with [support@litium.com](mailto:support@litium.com) where you provide link to where we can get access to your code and a database backup.
---
### Author:  [@Robin.w](https://forum.litium.com/u/Robin.w)
#### Post date: [January 23, 2019, 10:30pm UTC](https://forum.litium.com/t/not-able-to-open-the-left-tree-which-lists-pages/520/4 "2019-01-23T22:30:21Z")
I fixed my code, don’t know exactly how 🙂
Thanks!
---
### Author:  [@patric.forsgard](https://forum.litium.com/u/patric.forsgard)
#### Post date: [January 24, 2019, 9:29am UTC](https://forum.litium.com/t/not-able-to-open-the-left-tree-which-lists-pages/520/5 "2019-01-24T09:29:17Z")
I have been able to find an bug (44891) during the execution of the migration script. The error is because of property names with `-` not is migrated correctly.
To fix this in your upgraded database you can run the following sql command.
```auto
UPDATE
Sites.PageFieldData
SET
FieldDefinitionId = Replace(Replace(FieldDefinitionId, '-', ''), ' ', '_'),
ChildOwnerId = Replace(Replace(ChildOwnerId, '-', ''), ' ', '_')
WHERE
FieldDefinitionId LIKE '%-%'
OR ChildOwnerId LIKE '%-%';
```
If you want to validate if it exists some other fields that have wrong name you can use the following script that will print them out
```auto
SELECT FD.*
FROM Sites.PageFieldData FD
LEFT JOIN FieldFramework.FieldDefinition F ON F.Id = FD.FieldDefinitionId
LEFT JOIN FieldFramework.FieldDefinition F2 ON F2.Id = FD.ChildOwnerId
WHERE
(F.Id IS NULL OR (FD.ChildOwnerId <> '' AND F2.Id IS NULL))
AND NOT SUBSTRING(FD.FieldDefinitionId, 1, 1) = '_'
```
---
### Author:  [@patric.forsgard](https://forum.litium.com/u/patric.forsgard)
#### Post date: [January 24, 2019, 9:30am UTC](https://forum.litium.com/t/not-able-to-open-the-left-tree-which-lists-pages/520/6 "2019-01-24T09:30:28Z")
Another part that can be an issue in solutions is when the same package is used in different versions in the installation. You will easy find them in the `NuGet - Solution` view in the below tab.
---
### Author:  [@patric.forsgard](https://forum.litium.com/u/patric.forsgard)
#### Post date: [January 24, 2019, 9:44am UTC](https://forum.litium.com/t/not-able-to-open-the-left-tree-which-lists-pages/520/7 "2019-01-24T09:44:38Z")
> [@Robin.w](#):
>
> you should see the error in the network tab.
If you go into _settings \ system settings \ web log_ and you will see a **nice** error message.
---
### Author:  [@jinesh](https://forum.litium.com/u/jinesh)
#### Post date: [January 24, 2019, 12:05pm UTC](https://forum.litium.com/t/not-able-to-open-the-left-tree-which-lists-pages/520/8 "2019-01-24T12:05:55Z")
The query updated no rows. Consolidate update didn’t fixed as well
---
### Author:  [@patric.forsgard](https://forum.litium.com/u/patric.forsgard)
#### Post date: [January 24, 2019, 12:28pm UTC](https://forum.litium.com/t/not-able-to-open-the-left-tree-which-lists-pages/520/9 "2019-01-24T12:28:46Z")
If you go into this view, what is that saying?
> _settings \ system settings \ web log_
Do you get any rows back with the select-command?
```auto
SELECT FD.*
FROM Sites.PageFieldData FD
LEFT JOIN FieldFramework.FieldDefinition F ON F.Id = FD.FieldDefinitionId
LEFT JOIN FieldFramework.FieldDefinition F2 ON F2.Id = FD.ChildOwnerId
WHERE
(F.Id IS NULL OR (FD.ChildOwnerId <> '' AND F2.Id IS NULL))
AND NOT SUBSTRING(FD.FieldDefinitionId, 1, 1) = '_'
```
---
### Author:  [@jinesh](https://forum.litium.com/u/jinesh)
#### Post date: [January 25, 2019, 3:54am UTC](https://forum.litium.com/t/not-able-to-open-the-left-tree-which-lists-pages/520/10 "2019-01-25T03:54:50Z")
> [@patric.forsgard](#):
>
> SELECT FD.\* FROM Sites.PageFieldData FD LEFT JOIN FieldFramework.FieldDefinition F ON F.Id = FD.FieldDefinitionId LEFT JOIN FieldFramework.FieldDefinition F2 ON F2.Id = FD.ChildOwnerId WHERE (F.Id IS NULL OR (FD.ChildOwnerId \<\> ‘’ AND F2.Id IS NULL)) AND NOT SUBSTRING(FD.FieldDefinitionId, 1, 1) = ‘\_’
It doesn’t return any rows. I checked event log as well, as soon i clicked on tree node. But couldn’t find anything there as well. But got the below error from console
The first error is fine, its due to a code issue while previewing page.
The second error says net::ERR\_CONNECTION\_RESET
---
### Author:  [@patric.forsgard](https://forum.litium.com/u/patric.forsgard)
#### Post date: [January 25, 2019, 7:56am UTC](https://forum.litium.com/t/not-able-to-open-the-left-tree-which-lists-pages/520/11 "2019-01-25T07:56:33Z")
What’s the weblog-saying?
The database that you provided in the support ticket is working with your code after I run the above SQL script. So little hard to get advise about whats wrong.
---
### Author:  [@jinesh](https://forum.litium.com/u/jinesh)
#### Post date: [January 25, 2019, 8:11am UTC](https://forum.litium.com/t/not-able-to-open-the-left-tree-which-lists-pages/520/12 "2019-01-25T08:11:12Z")
I did an upgrade on fresh DB, and executed the update query that you send above.
Now it works fine.
I guess, some weird thing happened to old DB, while I tried to upgrade it (May be while renaming field definition)