Core worker service is not running due to the error "The given assembly name or codebase was invalid"

Issue

After performing a major KTA upgrade, the core worker service failed to start and remain running.

Checking in the event viewer log, below error is observed:

Service cannot be started. System.IO.FileLoadException: The given assembly name or codebase was invalid. (Exception from HRESULT: 0x80131047)
   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)
   at Microsoft.Practices.Unity.Configuration.ConfigurationHelpers.TypeResolverImpl.SearchAssemblies(String typeNameOrAlias)
   at Microsoft.Practices.Unity.Configuration.ConfigurationHelpers.TypeResolverImpl.ResolveTypeInternal(String typeNameOrAlias)
   at Microsoft.Practices.Unity.Configuration.ConfigurationHelpers.TypeResolverImpl.ResolveType(String typeNameOrAlias, Boolean throwIfResolveFails)
   at M...

Solution

Run a repair installation on the KTA

Level of Complexity 

Easy

Applies to  

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