Article - CS333034
Unable to Connect to KEPServerEX from 64-Bit Client via OPC DA
Modified: 02-Nov-2020
Applies To
- Kepware Server (formerly KEPServerEX) 5.19.467.0 to 6.8
- ThingWorx Kepware Server (legacy) 8.0 to 8.4
Description
Problem: When using a 64-bit client to connect to KEPServerEX* via an OPC DA or HDA interface, the client is unable to connect. The client cannot browse to the server and manual input of connection properties is ineffective. COM error code "0x80040154 ? Class not registered" may be returned to the client. *(or LinkMaster or RedundancyMaster) Solution: Install the 64-bit version of Classic OPC Core Components on both Kepware software workstation and client workstation. The x64 installer for Classic Core Components is available through the OPC Foundation only with user registration.
This is a printer-friendly version of Article 333034 and may be out of date. For the latest version click CS333034