Symptoms

After upgrading to K2 blackpearl 4.6.8, client event notifications do not send
 

Diagnoses

Looking in the HostServer log, the following error is shown during startup:

An error has occurred: System.IO.FileNotFoundException: Could not load file or assembly 'SourceCode.EventBus.SharePoint15.ProcessStarter.dll' or one of its dependencies. The system cannot find the file specified.
File name: 'SourceCode.EventBus.SharePoint15.ProcessStarter.dll' ---andgt System.IO.FileNotFoundException: The system cannot find the file specified. (Exception from HRESULT: 0x80070002)
at System.Reflection.AssemblyName.nGetFileInformation(String s)
at System.Reflection.AssemblyName.GetAssemblyName(String assemblyFile)
at SourceCode.EventBus.Utils.Reflection.ReflectionUtils.GetAssemblyFullname(String assemblyNamePath)
at SourceCode.EventBus.Server.EventQueueProcessing.InitializeAllowedAssemblies()
at SourceCode.EventBus.Server.EventQueueProcessing.Main()
 

Resolution

Open the "SourceCode.Eventbus.Assemblies.config" file in the C:Program Files(x86)K2 blackpearlHost ServerBin directory and see if the following line exists:

andltassembly displayname="SharePoint15ProcessStarter" fullname="C:Program Files (x86)K2 blackpearlHost ServerBinSourceCode.EventBus.SharePoint15.ProcessStarter.dll" /andgt

If it does, remove it and save the file (after making a backup copy just in case), and then restart the K2 service.