We recently upgraded from Sitecore 8 to Sitecore 10.1 and have encountered an error in Path Analyzer. The error message is:

Message: Could not load type 'Sitecore.ContentTesting.Rules.Conditions.EntryPageCondition' from assembly 'Sitecore.ContentTesting'.
Source: mscorlib
   at System.RuntimeTypeHandle.GetTypeByName(String name, Boolean throwOnError, Boolean ignoreCase, Boolean reflectionOnly, StackCrawlMarkHandle stackMark, IntPtr pPrivHostBinder, Boolean loadTypeFromPartialName, ObjectHandleOnStack type)
   at System.RuntimeTypeHandle.GetTypeByName(String name, Boolean throwOnError, Boolean ignoreCase, Boolean reflectionOnly, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean loadTypeFromPartialName)
   at System.Type.GetType(String typeName, Boolean throwOnError)
   at Sitecore.Marketing.Segmentation.ExpressionBuilder.ContentTreePredicateDescriptorLocator.GetDescriptor(Guid id)

 464 08:48:58 ERROR [Path Analyzer] Error during aggregation.
Exception: Sitecore.XConnect.Segmentation.ExpressionBuilder.PredicateDescriptorException
Message: No known predicate type could be determined from 'Sitecore.ContentTesting.Rules.Conditions.EntryPageCondition,Sitecore.ContentTesting' specified in the definition item (Id = '9bd1f746-b5df-4fe3-a1f8-af6dfb660333', db = 'master') : Could not load type 'Sitecore.ContentTesting.Rules.Conditions.EntryPageCondition' from assembly 'Sitecore.ContentTesting'.
Source: Sitecore.Marketing.Segmentation.xMgmt
   at Sitecore.Marketing.Segmentation.ExpressionBuilder.ContentTreePredicateDescriptorLocator.GetDescriptor(Guid id)
   at Sitecore.Marketing.Segmentation.RuleXmlConverter.ConditionXmlNodeConverter.LookupType(Guid descriptorId)
   at Sitecore.Marketing.Segmentation.RuleXmlConverter.ConditionXmlNodeConverter.ConvertNodeInternal(INodeConversionContext`2 context, XElement element)
   at Sitecore.Marketing.Segmentation.RuleXmlConverter.BaseXmlRuleNodeConverter`1.Convert(INodeConversionContext`2 context, XElement node)
   at Sitecore.Marketing.Segmentation.RuleXmlConverter.AndXmlNodeConverter.ConvertNodeInternal(INodeConversionContext`2 context, XElement element)
   at Sitecore.Marketing.Segmentation.RuleXmlConverter.BaseXmlRuleNodeConverter`1.Convert(INodeConversionContext`2 context, XElement node)
   at Sitecore.XConnect.Segmentation.ExpressionBuilder.TreeConverter.TreeConverter`2.Convert(TFromNode treeRoot)
   at Sitecore.Marketing.Segmentation.RuleXmlConverter.RuleXmlConverter.CreateRule(XElement ruleElement)
   at System.Linq.Enumerable.WhereSelectEnumerableIterator`2.MoveNext()
   at System.Linq.Buffer`1..ctor(IEnumerable`1 source)
   at System.Linq.Enumerable.ToArray[TSource](IEnumerable`1 source)
   at Sitecore.PathAnalyzer.Rules.RulesBuilder.BuildXmlRules(String rulesXml)
   at Sitecore.PathAnalyzer.Rules.RulesBuilder.BuildRules(String rulesXml)
   at Sitecore.PathAnalyzer.Rules.RulesValidator.ValidateRule(Interaction interaction, String rulesXml, ConditionParameters parameters)
   at Sitecore.PathAnalyzer.Construction.TreeBuilder.IsApplicable(Interaction interaction, String rulesXml, ConditionParameters conditionParameters)
   at Sitecore.PathAnalyzer.Construction.TreeBuilder.Build(Interaction interaction)
   at Sitecore.PathAnalyzer.Processing.AggregationContextCollector.Collect(Interaction interaction)
   at Sitecore.PathAnalyzer.Processing.TreeAggregator.Aggregate(ItemBatch`1 batch)
   at Sitecore.PathAnalyzer.Processing.Agents.TreeAggregatorAgent.Execute()

The error is complaining about the type Sitecore.ContentTesting.Rules.Conditions.EntryPageCondition which exists in the assembly Sitecore.ContentTesting.

I have tried the following steps to get rid of the error.

  • Deleted from TreeDefinitions

  • Redeployed all Path Analyzer Map definitions by visiting the tool - /sitecore/admin/pathanalyzer.aspx

  • Clicked "Deploy all maps that are not deployed" in the Maps Manager section

  • Clicked "Rebuild" in the Historic Map Rebuild section

  • Cleared all tables in the RefData database

  • Redeployed all Marketing Definitions

  • Rebuild the xDB index in Solr

  • Rebuild the reporting database

  • Rebuild all Solr indexes

  • Reset the IIS pool multiple times

Although the above steps have allowed me to show data being recorded in the xDB correctly, Path Analyzer errors continue to occur.

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I have also checked the assembly. It has a EntryPageConditions class.

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Can someone suggest potential solutions to resolve it? Thank you.


1 Answer 1


Seems to me that you have upgraded the database, but not deployed the latest sitecore DLLS.

If you look at the latest v8 release - Sitecore Experience Platform 8.0 Update-6. The Sitecore.ContentTesting assembly doesnt contain the EntryPageCondition Class.

Sitecore Experience Platform 8.0 Update-6 - sitecore.contenttesting.dll

Whereas the equivalent in Sitecore Experience Platform 10.1 Update-2 has the class defined. Sitecore Experience Platform 10.1 Update-2 - Sitecore.Contenttesting.dll

Please review the bin folder on your sitecore installation. Check the properties of the Sitecore.ContentTesting.dll and ensure you are running Assembly: Sitecore.ContentTesting, Version=


Further suggestions if DLLs updated.

  • Check solution (and .csproj files) for any old references that might somehow be lookng for old version of the file.
  • Also double check all other sitecore references are updated to 10.1
  • Ensure all projects correctly updated to run on .net 4.8
  • If you using processing server confirm DLLs have been successfully update there too.
  • Backup Sitecore DLLs then remove all and replace with DLLs from a clean install
  • thanks for the reply. Dll was the first thing I checked to make sure that the EntryPageConditions class exist in the Sitecore.ContentTesting API. I am using version 17.0.2. The assembly is correct and It has the required class. I have now updated my question. Mar 15, 2023 at 1:01
  • thanks owais - please see update Mar 15, 2023 at 8:28

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