What should I do if I get the message "No Data" for my .NET monitor

If you see No Data in your .NET monitor, follow the steps below to identify and resolve the issue.

Step 1: Check agent status using the Health Monitor tool

Log in to the respective server, open the APM Insight .NET Agent Health Monitor from the Start menu, and check for any of the following messages:

Message	Cause	Corrective action
Agent service is not running	May be stopped due to antivirus software or manually by the user.	Open Windows Services Console. Locate and start the APM Insight .NET Agent service. Set Startup Type = Automatic. Perform transactions in the application.
Could not connect to host	The server is behind a proxy or using an outdated TLS version (versions below 1.2) for communication.	Update proxy settings in the APM Insight .NET Agent configuration window. Test connectivity to plusinsight.site24x7.com in a browser. For outdated TLS versions, update to the latest .NET agent.
Profiling environment variables not set	A competing profiler has been installed.	Navigate to the Tools tab and click Repair Installation. Uninstall any competing profilers and restart the APM Insight .NET Agent service (this will reset IIS). Note Please check this Knowledge Base for more information.
No. of apps included for monitoring - 0	Applications to be monitored are either not configured in the APM Insight .NET Agent configuration window or were added after the configuration.	Open the APM Insight .NET agent configuration window > Applications tab, select applications to monitor, and click Save. This will recycle app pools.
[IIS Applications tab] License key not given / License expired / License instance exceeded	The limit for advanced monitors may have been reached, or there might be a delay in bill payments. Since the agent communicates every 15 minutes, any license-related issues may not be reflected immediately.	Make sure you have enough advanced monitor licenses and the correct license keys. Then, go to the %ProgramData%\DotnetAgent folder, delete the apminsight.net.info file, and restart the agent.
[IIS Applications tab] Monitor is in a Deleted or Marked for deletion state	Attempting to re-add a monitor after it was deleted from the Site24x7 console.	Delete the apminsight.net.info file for the corresponding application from the %ProgramData%\DotnetAgent folder, then restart the APM Insight .NET Agent service (this will recycle the application pools).

Step 2: Check monitor status in the Site24x7 portal

If the Overview page shows No data collected for selected time period.

Cause	Solution
No traffic in the application	Access the application in a browser to simulate transactions.
Other APM tools conflicting	Go to Control Panel > Programs and Features, check for and uninstall other APM tools (e.g., New Relic, Dynatrace). Then, perform an IISRESET and generate traffic.
Site selected instead of actual application	In IIS Manager, check if the selected item has both bin/ and web.config. If not, it’s not an application. Reconfigure the agent to monitor the actual application in the Applications tab, save the config, and generate traffic.

Note

If you incorrectly selected a site (without bin or web.config), a monitor will still be created. You can suspend such monitors from the Site24x7 portal to save license usage.