If you use WebX clients, you will need to upgrade them after you have upgraded your ClearSCADA server. During the ClearSCADA upgrade process, a new WebX ActiveX control is installed on the server. For WebX clients to be able to connect to the server, they must also have the new ActiveX control installed.
If your WebX clients are able to download an ActiveX control, the upgrade will take place automatically when they connect to the ClearSCADA server. Each WebX client will download the required ActiveX control from the ClearSCADA server and install it. For this to happen, Microsoft Internet Explorer must be configured to have the Download Signed ActiveX Controls feature enabled.
If your company security policy prohibits the downloading of ActiveX controls, the WebX clients will be unable to download the required ActiveX control from the server. You will need to upgrade the WebX clients by using a ClearSCADA software DVD (follow the instructions on each ‘page’ of the installer and ensure that you install the WebX Client component).
ATTENTION: A WebX client can only connect to an upgraded ClearSCADA server if the client has the latest ActiveX control. So if you are installing the new ActiveX control, you need to be aware that your WebX clients will be unable to connect until you complete the installation.