Most OPC Clients and Servers use DCOM to communicate over a network and thus will
be impacted due to the changes in Windows XP Service Pack 2 or Windows 2003 SP1. When these service packs are installed with
default configuration settings, OPC communication via DCOM will cease to work.
This paper describes the settings necessary to restore OPC communication when using
XP Service Pack 2 (SP2) or 2003 SP1.
Click here if you're using NT/2000
Click here if you don't have any Service Packs installed.
While these changes may be possible for most applications, there may be some situations where users are be unable to make the necessary changes. In these cases, MatrikonOPC recommends Matrikon OPC Tunneller.