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Unexpected list type exception when calling ISessionAwareCoreService.GetList ()

I call the main service of Tridion 2011 SP1 through the submitted client assembly. When I try to list the contents of a publication, I get an exception.

The code (simplified) is as follows:

ItemsFilterData filter = new Tridion.ContentManager.CoreService
                     .Client.RepositoryItemsFilterData.RepositoryItemsFilterData();
filter.ItemTypes = new ItemType[] { 
    ItemType.Folder, 
    ItemType.StructureGroup 
};
filter.Recursive = false;                        

IEnumerable<IdentifiableObjectData> childItems = core.GetList("tcm:0-15-1", filter);

Note: the variable "core" refers to ISessionAwareCoreService, which I can successfully use to call, for example core.GetSystemWideList ()

When .GetList is called, I get the following exception:

System.ServiceModel.FaultException`1 was unhandled
  Message=Unexpected list type: 
     Tridion.ContentManager.Data.ContentManagement.RepositoryItemsFilterData.

What are the possible causes of this problem? Can you suggest a good general approach for interpreting this kind of message?

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1 answer

Publication GetList. PublicationData client.Read, RootFolder RootStructureGroup.

PublicationData pub = (PublicationData)core.Read("tcm:0-1-1", new ReadOptions());
string rootFolder = pub.RootFolder.IdRef;
string rootSG = pub.RootStructureGroup.IdRef;

GetListXml RepositoryItemsFilterData XML.

XElement listResult = core.GetListXml(parent.ID, filter);
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