Right after successfully creating a simple XML Web Service all the values show 0 and the Web Service is offline
EcoStruxure Building Operation
Simple XML Web Service
Possible cause 1: SmartStruxure Workstation can handle URL's both with and without the final forward slash even if the URL is just an IP address and a port number. The ES or AS can't handle that, and so after creating the variables through Workstation, the Web Service goes offline after it is added to the server.
Possible cause 2: The XML file or response is not UTF8 encoded but "UCS-2 LE BOM" encoded or something else.
Solution 2: Make sure the XML file is correctly encoded in UTF8 - you can check and change the encoding with e.g. Notepad++