Power Monitoring Expert (PME) Real Time Data Does Not Work in Web Applications

Question

Accepted Answer

Issue:

When trying to view real time data in places such as Trends and Dashbords (table gadget) it displays an error message that it cannot retrieve data. This issue is only localized to the web application, and real time data works in the thick apps such as Vista. Example below from the Trends tab within Web Applications when the real time data does not load and displays an explanation point. The message attributed to the error says: "Cannot retrieve any data. Ensure that all required services are running on the server."

get real time data error in trends

When looking at the System Log the following error is displayed corresponding to the error message:

Event ID: 2862945
Log Type: Application
Priority: 191 (Error)
Timestamp (UTC): 7/20/2026 6:03:49.997 PM (Coordinated Universal Time)
Timestamp (Server): 7/20/2026 2:03:49.997 PM (Eastern Daylight Time)
Location: ION Enterprise-Default
Categories: General, DataSourceDriver, ION Enterprise, ION Enterprise-Default

Message:
Exception caught in method GetRealTimeData: The content type text/html; charset=utf-8 of the response message does not match the content type of the binding (text/xml; charset=utf-8). If using a custom encoder, be sure that the IsContentTypeSupported method is implemented properly. The first 1024 bytes of the response were: '" rel="noreferrer noopener" target="_blank" title="http://www.w3.org/tr/xhtml1/dtd/xhtml1-strict.dtd%22%3e">http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
http://www.w3.org/1999/xhtml">

IIS 10.0 Detailed Error - 500.19 - Internal Server Error