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I get an error on my sites in IIS, Microsoft.EnterpriseManagement.OperationsManager.Apm.DataCollecting.Producers.Mvc.4.0 not found

I started getting this error in two (completely different) projects running in IIS:

Server Error in '/' Application. Could not load file or assembly 'Microsoft.EnterpriseManagement.OperationsManager.Apm.DataCollecting.Producers.Mvc.4.0, Version=7.0.5000.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The system cannot find the file specified. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.IO.FileNotFoundException: Could not load file or assembly 'Microsoft.EnterpriseManagement.OperationsManager.Apm.DataCollecting.Producers.Mvc.4.0, Version=7.0.5000.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The system cannot find the file specified. Source Error: An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below. Assembly Load Trace: The following information can be helpful to determine why the assembly 'Microsoft.EnterpriseManagement.OperationsManager.Apm.DataCollecting.Producers.Mvc.4.0, Version=7.0.5000.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' could not be loaded. WRN: Assembly binding logging is turned OFF. To enable assembly bind failure logging, set the registry value [HKLM\Software\Microsoft\Fusion!EnableLog] (DWORD) to 1. Note: There is some performance penalty associated with assembly bind failure logging. To turn this feature off, remove the registry value [HKLM\Software\Microsoft\Fusion!EnableLog]. Stack Trace: [FileNotFoundException: Could not load file or assembly 'Microsoft.EnterpriseManagement.OperationsManager.Apm.DataCollecting.Producers.Mvc.4.0, Version=7.0.5000.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The system cannot find the file specified.] System.Web.Mvc.ViewResultBase.ExecuteResult(ControllerContext context) +0 System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilterRecursive(IList`1 filters, Int32 filterIndex, ResultExecutingContext preContext, ControllerContext controllerContext, ActionResult actionResult) +90 System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilterRecursive(IList`1 filters, Int32 filterIndex, ResultExecutingContext preContext, ControllerContext controllerContext, ActionResult actionResult) +833 System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilterRecursive(IList`1 filters, Int32 filterIndex, ResultExecutingContext preContext, ControllerContext controllerContext, ActionResult actionResult) +833 System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilterRecursive(IList`1 filters, Int32 filterIndex, ResultExecutingContext preContext, ControllerContext controllerContext, ActionResult actionResult) +833 System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilterRecursive(IList`1 filters, Int32 filterIndex, ResultExecutingContext preContext, ControllerContext controllerContext, ActionResult actionResult) +833 System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilterRecursive(IList`1 filters, Int32 filterIndex, ResultExecutingContext preContext, ControllerContext controllerContext, ActionResult actionResult) +833 System.Web.Mvc.ControllerActionInvoker.InvokeActionResultWithFilters(ControllerContext controllerContext, IList`1 filters, ActionResult actionResult) +81 System.Web.Mvc.Async.<>c__DisplayClass21.<BeginInvokeAction>b__1e(IAsyncResult asyncResult) +186 System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeAction(IAsyncResult asyncResult) +38 System.Web.Mvc.Controller.<BeginExecuteCore>b__1d(IAsyncResult asyncResult, ExecuteCoreState innerState) +29 System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +65 System.Web.Mvc.Controller.EndExecuteCore(IAsyncResult asyncResult) +53 System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +36 System.Web.Mvc.Controller.EndExecute(IAsyncResult asyncResult) +38 System.Web.Mvc.MvcHandler.<BeginProcessRequest>b__5(IAsyncResult asyncResult, ProcessRequestState innerState) +44 System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +65 System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) +38 System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +657 System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +146 Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.6.79.0

The error goes away if I wait a bit and then refresh the page several times. I am running Windows 10 with Visual Studio 2015. As I said, the projects are completely different and have nothing to do with eachother.

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3 answers

What a mess. I had the same thing with me when I returned to the project that I worked on 4-5 months ago.

A hint about application knowledge is what led me to the solution, but uninstalling old application ideas didn't help solve the problem.

I solved it by installing the Insight application status monitor in a preview (which I found in the web platform installer in IIS by clicking "Install Application from Gallery" on the right). Then I ran and my IIS app appeared. I clicked on “configure” or whatever, to make it “Enabled” for it. Then, at the top of the Instaights application status preview window, I saw a thing saying that I was running the Microsoft Monitor agent or something like that, so I clicked the button there and it told me to reset IIS. After restarting IIS, it worked.

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I solved this by uninstalling the old client for IIS using Control Panel> Programs and Features.

Sorry, but I don’t remember the name of the program. I remember that it was pretty obvious what it was. There was only one.

Matt

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Verify that the application pool identifier for the website is a member of the Performance Monitor Users group.

When I started a preview of the status status of the Insight application, I saw a warning that my application pool identifier was not a member of this group.

  • Windows Button
  • type mmc , ENTER
  • File → Add / Remove Snap-in ...
  • Select "Local Users and Groups" and click "Add>" and "Finish" in the second dialog box.
  • Click OK in the initial dialog box.
  • Expand Local Users and Groups node
  • Expand "Groups" node
  • Double-click the Performance Monitor Users group.
  • Add application pool id to group
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