This interface has unique system requirements in order to run correctly. Whenever possible, it is best to install this interface on the same computer where the OPC Historian (OPC HDA) is running.  Please note the following.

The interface has WtHDAClient.dll library included with it, this dynamic linked library should be located in the same folder as the application. The Interface uses the WtHDAClient.dll to communicate with an OPC HDA Server.

In order for this interface to run, OPCENUM must be running as a service and OPCDAAUTO.DLL must be properly installed. Both OPC components can be downloaded from the OPC Core Components at the OPC Foundation: http://www.opcfoundation.org/SiteMap.aspx?MID=Downloads. Click on the Redistributables link. You must have a user login with the foundation to download files.