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Tutorial: Debug a plug-in

This tutorial is the second in a series that will show you how to work with plug-ins.

For detailed explanation of supporting concepts and technical details see:

Goal

Because the plug-in executes on a remote server, you cannot attach a debugger to the plug-in process. The plug-in profiler captures a profile of an executing plug-in and allows you to re-play the execution of the plug-in using Visual Studio on your local computer.

Prerequisites

  • All the prerequisites for Tutorial: Write and register a plug-in apply. See Prerequisites. The exception is that Visual Studio 2019 or later is required to install and use Power Platform Tools.
  • If you haven't completed the previous tutorial, you can use the general steps below with a different registered plug-in.

Install plug-in profiler

There are two tools available from which to run the Plug-in Profiler: the Plug-in Registration Tool and Power Platform Tools for Visual Studio. Instructions for the use of both tools are provided in this tutorial.

  1. If the Plug-in Registration tool isn't already installed and open, follow the steps in Tutorial: Write and register a plug-in to open it. Complete the Connect using the Plug-in Registration tool section.

  2. In the Plugin Registration tool, click Install Profiler.

    Install Profiler.

Following the steps provided above results in a new managed solution named Plug-in Profiler in your Microsoft Dataverse development environment.

Start profiling

Follow these steps to begin profiling a plug-in's execution.

  1. In the Plug-in Registration tool, select the (Step) BasicPlugin.FollowupPlugin: Create of account step you registered earlier, and click Start Profiling.

    Start profiling.

  2. When presented with the Profiler Settings dialog, accept the default settings and click OK to close the dialog.

    Profiler settings.

Tip

For alternate information about running the profiler installed with the Plug-in Registration Tool see Run the plug-in profiler from a Command Prompt window.

Capture a profile

In your model-driven (or other) app, create a new account to execute the plug-in. This will capture an instance of the plug-in executing and persist it as a Plug-in Profile table row in Dataverse. You can see this row in Power Apps under Tables > Plug-in Profile by choosing Data.

  1. In the Plug-in Registration tool, click Debug.

    Click Debug.

  2. In the Replay Plug-in Execution dialog, on the Setup tab, click the Select profile command. icon to open the Select Profile from CRM dialog.

  3. In the Select Profile from CRM dialog, select the profile where Type Name equals BasicPlugin.FollowupPlugin and represents the profile captured when you last triggered the plug-in.

    Select Profile from CRM dialog.

Debug your plug-in

Follow these steps to debug your plug-in code.

  1. In the Replay Plug-in Execution dialog, on the Setup tab, in the Specify Assembly section, click the ellipses () button and choose the location of your BasicPlugin.dll.

    Replay plug-in execution.

  2. In your Visual Studio project, set a break point in your plug-in class.

    Set a break point.

  3. In your Visual Studio project, select Debug > Attach to Process….

    Attach to process command.

  4. Select the PluginRegistration.exe process and click Attach.

    Attach to process dialog.

    Note

    You should see that the Plug-in Registration tool is now running in debug mode.

  5. In the Replay Plug-in Execution dialog, click Start Execution.

    Start Execution.

  6. In your Visual Studio project, you should see that the code is paused at the breakpoint you set earlier.

    Breakpoint hit.

  7. Step through your code to debug.

Stop profiling

Follow these steps to stop profiling the plug-in's execution.

  1. Close the Replay Plug-in Execution dialog

  2. In the Plug-in Registration tool, click Stop Profiling

    Stop profiling.

Next steps

To learn more about common things you will do with plug-ins, continue to Tutorial: Update a plug-in

If you will not continue to the next tutorial you should unregister the BasicPlugin assembly you created in this step. See Unregister assembly, plug-in, and step for instructions.

Run the plug-in profiler from a Command Prompt window

While it is often preferable to run the profiler interactively from the Plug-in Registration tool, the profiler can be executed from a Command Prompt window independent of the tool. This is useful to obtain the plug-in profile log from a customer's Dynamics 365 apps server to debug a failed plug-in. A developer can then use that log to replay the plug-in's execution in the Plug-in Registration tool and debug the plug-in usingVisual Studio.

Procedure: Run the plug-in profiler from a Command Prompt

  1. Open a Command Prompt window and set the working directory to the folder where you downloaded the Plug-in Registration tool PluginRegistration.exe.
  2. Type this command to see the available run-time parameters: PluginProfiler.Debugger.exe /?.
  3. Review the supported parameter list and re-run the PluginProfiler.Debugger.exe program with the appropriate parameters.