The following message started occurring after trying to run a DS (Deployment Solution) Task:
Operation 'Start' failed for instance: 4a56f09b-d9ae-4611-92e0-3a529598513cCould not load file or assembly 'Symantec.Deployment.TaskServerHandler, Version=8.1.0.0, Culture=neutral, PublicKeyToken=d3604070d7fd3e08' or one of its dependencies. The system cannot find the file specified.
Operation 'Start' failed for instance: 4a56f09b-d9ae-4611-92e0-3a529598513cCould not load file or assembly 'Symantec.Deployment.TaskServerHandler, Version=8.1.0.0, Culture=neutral, PublicKeyToken=d3604070d7fd3e08' or one of its dependencies. The system cannot find the file specified. [System.IO.FileNotFoundException @ mscorlib] at System.Reflection.RuntimeAssembly._nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks) at System.Reflection.RuntimeAssembly.InternalLoadAssemblyName(AssemblyName assemblyRef, Evidence assemblySecurity, RuntimeAssembly reqAssembly, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks) at System.Reflection.RuntimeAssembly.InternalLoad(String assemblyString, Evidence assemblySecurity, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean forIntrospection) at System.Reflection.RuntimeAssembly.InternalLoad(String assemblyString, Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean forIntrospection) at System.Reflection.Assembly.Load(String assemblyString) at Altiris.DotNetLib.Reflection.ObjectCreator.Create(String objType, String objAssembly) at Altiris.ClientTask.Server.Execution.ClientTaskExecutionEngine.GetTaskHandler(IBaseTaskExecutionInstance instance) at Altiris.TaskManagement.Common.Execution.Engine.TaskExecutionEngine.ProcessTaskExecuteOperation(TaskInstanceRequest request)
Exception logged from: at Altiris.DotNetLib.Logging.AtrsLog.ExceptionMessage(String message, Exception exception) at Altiris.TaskManagement.Common.Execution.Engine.TaskExecutionEngine.OnRequestException(Exception e, TaskInstanceRequest request) at Altiris.ClientTask.Server.Execution.ClientTaskExecutionEngine.OnRequestException(Exception e, TaskInstanceRequest request) at Altiris.TaskManagement.Common.Execution.Engine.TaskExecutionEngine.ProcessTaskExecuteOperation(TaskInstanceRequest request) at Altiris.TaskManagement.Common.Execution.Engine.TaskExecutionEngine.ProcessTaskInstanceRequest(TaskInstanceRequest request) at Altiris.ClientTask.Server.Execution.ClientTaskExecutionEngine.ProcessTaskInstanceRequest(TaskInstanceRequest request) at Altiris.TaskManagement.Common.Execution.Engine.TaskExecutionEngine.ProcessWorkToDoObject(Object nextWork) at Altiris.DotNetLib.Threading.AtrsThreadPoolEx.ProcessWorkToDo(Thread me, AtrsThreadPoolWorkItemEx work) at Altiris.DotNetLib.Threading.AtrsThreadPoolEx.ProcessWorkToDo() at Altiris.DotNetLib.Threading.AtrsThreadPoolEx.WorkerThreadRun() at Altiris.DotNetLib.Threading.AtrsThreadPoolEx.WorkerThreadProc() at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx) at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx) at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state) at System.Threading.ThreadHelper.ThreadStart()
-----------------------------------------------------------------------------------------------------Date: 3/27/2019 1:14:24 PM, Tick Count: 79854758 (22:10:54.7580000), Size: 3.47 KBProcess: AtrsHost (8252), Thread ID: 76, Module: AtrsHost.exePriority: 2, Source: ClientTaskExecutionEngine
ITMS 8.1 RU7
All those issues are related to DS Task Server handler not being installed properly.
Potential Reasons:
Try the following: