Operating Instructions

Chapter 5 – Troubleshooting
Siemens Building Technologies, Inc. 37
Chapter 5 – Troubleshooting
Chapter 5 contains the following topics:
• Error Messages
• Browsing Issues
• OPC Item Issues
• Redundancy Issues
Error Messages
Table 7 lists common error messages and solutions for those errors.
Table 7. Error Messages.
Error Message Explanation and Solution
Unable to open the
access token of
the current thread
Appears while creating a point that includes an OPC item on a remote server.
The likely cause of this problem is a DCOM misconfiguration of the local host, such
as the computer running the OPC Data Manager.
The easiest solution is to use the dcomconfig tool to give everyone DCOM access
to the local host:
1. Run dcomconfig.
2. On the Default Security tab, give everyone Access and Launch permissions.
Access denied
Appears while creating a point that includes an OPC item on a remote server.
The likely cause of this problem is a DCOM misconfiguration of the remote host,
such as the computer running the remote OPC server.
Use the dcomconfig tool to give DCOM Access and Launch permissions to the
user running the OPC Data Manager. If the OPC Data Manager is running as a
service under the System account, you must give everyone Access and Launch
permissions.
Browsing Issues
Unable to browse any network hosts for OPC servers.
The likely cause of this problem is related to registry permissions. The OPC Data Manager attempts to
browse the registry on the remote host to obtain a list of OPC servers installed on that host. Use the Data
Manager Settings dialog box to change the user context to an account with registry access privileges on
the remote host.
OPC server does not appear in the browse panel.
Make sure that the OPC server is installed and configured properly. Consult the vendor-supplied OPC
server manual for details.