The Hach WIMS Client needs to know what tags are available to link to WIMS variables. The Hach WIMS Client uses a browser control that contains a list of all the available tags that you defined. In order for the browser control to know what these tag are, it reads them in from an OPSDATAXML file. Once you have configured all the tags that you are interested in you need to open up the following screen:

You can launch this screen by click on  from the main Window.

Click the Save button to generate a file that contains all the tags. Remember where this file is stored because when you configure the Interface in Hach WIMS Client, it will ask where this file is stored.