Help Articles: WinCC OA Fatal Error 54

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Introduction

As shown in the screenshot below, Fatal, 54, Unexpected state, main, Data manager does not run on data host is a common error you may run into while developing or making changes to your WinCC OA application.

Typically when this happens it’s because there are config file entries for the data and event ports that do not match the ip address of the WinCC OA server network adapter. For example, your network adapter could be set as DHCP and your config file entry set with a fixed ip address. Simply make the appropriate change and your WinCC OA server will startup.

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