Upgrade Question:Test Studio 2012.2.1420 to TS 2014.1.410 (possible bug)

Hi,

I have upgraded from 2012.2.1420 to 2014.1.410 and encountered the following error message:

[05/07 13:56:31,Telerik.TestStudio.exe(12476:8),TestStudio] TestUpgrader.ConvertTestToJson() : Could not load test 'C:\...\...\TestName.aii' for upgrade.
[05/07 13:56:31,Telerik.TestStudio.exe(12476:8),TestStudio] SerializerService.<GetSettings>b__2() : Unexpected character encountered while parsing value: <. Path '', line 0, position 0.
[05/07 13:56:32,Telerik.TestStudio.exe(12476:8),ProjectModel] TestFileHandler.LoadFromDisk() : EXCEPTION! (see below)
     Situation: Unable to load test 'C:\...\...\TestName.aii'
     Outer Exception Type: System.Runtime.Serialization.SerializationException
     Message: Error in line 2 position 69. Element 'http://artoftest.com/schemas/WebAiiDesignCanvas/1.0.0:Step' contains data from a type that maps to the name 'http://schemas.datacontract.org/2004/07/Telerik.WebAii.Design.Translators.Xaml.TreeListView:RadTreeListViewIntegerPropertyVerification'. The deserializer has no knowledge of any type that maps to this name. Consider using a DataContractResolver or add the type corresponding to 'RadTreeListViewIntegerPropertyVerification' to the list of known types - for example, by using the KnownTypeAttribute attribute or by adding it to the list of known types passed to DataContractSerializer.
     HRESULT: 0x8013150C (Official ID (if app.) = COR_E_SERIALIZATION, Error Bit = FAILED, Facility = FACILITY_URT, Code = 5388)
     Call Stack:
          at System.Runtime.Serialization.XmlObjectSerializerReadContext.InternalDeserialize(XmlReaderDelegator reader, String name, String ns, Type declaredType, DataContract& dataContract)
          at System.Runtime.Serialization.XmlObjectSerializerReadContext.InternalDeserialize(XmlReaderDelegator xmlReader, Int32 id, RuntimeTypeHandle declaredTypeHandle, String name, String ns)
          at ReadAutomationStepFromXml(XmlReaderDelegator , XmlObjectSerializerReadContext , XmlDictionaryString[] , XmlDictionaryString[] )
          at System.Runtime.Serialization.ClassDataContract.ReadXmlValue(XmlReaderDelegator xmlReader, XmlObjectSerializerReadContext context)
          at System.Runtime.Serialization.XmlObjectSerializerReadContext.ReadDataContractValue(DataContract dataContract, XmlReaderDelegator reader)
          at System.Runtime.Serialization.XmlObjectSerializerReadContext.InternalDeserialize(XmlReaderDelegator reader, String name, String ns, Type declaredType, DataContract& dataContract)
          at System.Runtime.Serialization.XmlObjectSerializerReadContext.InternalDeserialize(XmlReaderDelegator xmlReader, Int32 id, RuntimeTypeHandle declaredTypeHandle, String name, String ns)
          at ReadAutomationStepListFromXml(XmlReaderDelegator , XmlObjectSerializerReadContext , XmlDictionaryString , XmlDictionaryString , CollectionDataContract )
          at System.Runtime.Serialization.CollectionDataContract.ReadXmlValue(XmlReaderDelegator xmlReader, XmlObjectSerializerReadContext context)
          at System.Runtime.Serialization.XmlObjectSerializerReadContext.ReadDataContractValue(DataContract dataContract, XmlReaderDelegator reader)
          at System.Runtime.Serialization.XmlObjectSerializerReadContext.InternalDeserialize(XmlReaderDelegator reader, String name, String ns, Type declaredType, DataContract& dataContract)
          at System.Runtime.Serialization.XmlObjectSerializerReadContext.InternalDeserialize(XmlReaderDelegator xmlReader, Int32 id, RuntimeTypeHandle declaredTypeHandle, String name, String ns)
          at ReadWebAiiTestFromXml(XmlReaderDelegator , XmlObjectSerializerReadContext , XmlDictionaryString[] , XmlDictionaryString[] )
          at System.Runtime.Serialization.ClassDataContract.ReadXmlValue(XmlReaderDelegator xmlReader, XmlObjectSerializerReadContext context)
          at System.Runtime.Serialization.XmlObjectSerializerReadContext.ReadDataContractValue(DataContract dataContract, XmlReaderDelegator reader)
          at System.Runtime.Serialization.XmlObjectSerializerReadContext.InternalDeserialize(XmlReaderDelegator reader, String name, String ns, Type declaredType, DataContract& dataContract)
          at System.Runtime.Serialization.XmlObjectSerializerReadContext.InternalDeserialize(XmlReaderDelegator xmlReader, Type declaredType, DataContract dataContract, String name, String ns)
          at System.Runtime.Serialization.DataContractSerializer.InternalReadObject(XmlReaderDelegator xmlReader, Boolean verifyObjectName, DataContractResolver dataContractResolver)
          at System.Runtime.Serialization.XmlObjectSerializer.ReadObjectHandleExceptions(XmlReaderDelegator reader, Boolean verifyObjectName, DataContractResolver dataContractResolver)
          at System.Runtime.Serialization.XmlObjectSerializer.ReadObject(XmlDictionaryReader reader)
          at ArtOfTest.WebAii.Design.ProjectModel.TestFileHandler.LoadFromXml(String normalizedPath)
          at ArtOfTest.WebAii.Design.ProjectModel.TestFileHandler.LoadFromDisk(String pathToFile, Boolean autoLoadTypes, FileOpenResult& result) 

Once I started looking at all of the tests that failed during the upgrade I found the common recorded step that was causing the issue:
radtreelistview(EncNavigationTreeRadtreelistview): root item count 'Equal' '0'.

***I am wondering if this is a bug or if this item is no longer valid and the upgrade is supposed to fail with the above message.