---
title: "Troubleshooting .NET Prefix"
slug: "troubleshooting-net-prefix"
description: "Easily Install, Configure and troubleshoot your Stackify .NET Prefix. Follow these troubleshooting steps."
updated: 2021-09-02T19:44:10Z
published: 2021-09-02T19:44:10Z
canonical: "docs.stackify.com/troubleshooting-net-prefix"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.stackify.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Troubleshooting .NET Prefix

## Troubleshooting Steps:

**1.** Verify that the .NET profiler supports the framework for your setup. Reference our [list of Supported Technologies](/v1/docs/net2-supported-technologies) for .NET.

**2.** If you are running/deploying your application through Visual Studio, verify that the `Stackify.json` file is a part of your project and set to "Copy Always" in the "Copy to output folder" properties.

**3.** Verify that the environment variables are the correct CLSID:

- **COR_PROFILER:** `{cf0d821e-299b-5307-a3d8-b283c03916da}`
- **CORECLR_PROFILER:** `{cf0d821e-299b-5307-a3d8-b283c03916da}`

And the correct system variables are present:

- **COR_PROFILER_PATH_32:** `C:\ProgramData\Stackify\Profiler\x86\Stackify.ClrProfiler_x86.dll`
- **COR_PROFILER_PATH_64:** `C:\ProgramData\Stackify\Profiler\x64\Stackify.ClrProfiler_x64.dll`
- **CORECLR_PROFILER_PATH_32:** `C:\ProgramData\Stackify\Profiler\x86\Stackify.ClrProfiler_x86.dll`
- **CORECLR_PROFILER_PATH_64:** `C:\ProgramData\Stackify\Profiler\x64\Stackify.ClrProfiler_x64.dll`

          Note:

          

The easiest way to validate the environment variables set for a process is through a Microsoft utility called [Process Explorer](https://docs.microsoft.com/en-us/sysinternals/downloads/process-explorer). With this tool (when ran as an Administrator) you can navigate to a process, click on the Environments tab and then confirm the Profiler IDs.

**4.** If the CLSIDs do not match in step 3 (due to an older version of Prefix, a different profiler being loaded, or some other reason), the next step is to manually set the values as System Environment Variables:

- Click the Start/Windows button and type in "Edit the System Environment Variables"
- When the window opens, select the button on the bottom right that reads "Environment Variables"
- The next window contains 2 lists, the top is User and the bottom is System, you will need to change the info for both.
- Edit the `COR_PROFILER` and `CORECLR_PROFILER` variables with the value of `{cf0d821e-299b-5307-a3d8-b283c03916da}` then click OK. (If these variables are missing for some reason, you should create them)
- Restart Visual Studio and/or IIS

1. If you are still having some issues after following the above steps, please grab the Prefix Diagnostics file and send it over to the [Stackify Support team](https://support.stackify.com/popup/submit-a-ticket/).  

To gather diagnostics:  

Navigate to the `App Menu` or `Tray Menu` depending on your operating system  

Select the **Advanced** option  

Select **Capture Diagnostics** option and save the file to your desired location

![Screen Shot 2021-09-01 at 9.28.00 AM.png](https://cdn.document360.io/3fcaf473-a1ef-4778-aa2c-fd28411c2b01/Images/Documentation/Screen%20Shot%202021-09-01%20at%209.28.00%20AM.png)