Cause
DCOM Error 0x80070005 appears in the OPC Client application when it succeeds in launching an OPC Server or OpcEnum, but fails to receive a reply from either of the applications. This error could be caused under several conditions: On the OPC Server PC, the OPC Client User Account does not have the right Access Control List (ACL) permissions in the System-Wide DCOM settings, Access Permissions, Edit Default.
On the OPC Client PC, the OPC Server User Account does not have the right Access Control List (ACL) permissions in the System-Wide DCOM settings, Access Permissions, Edit Limits.
On the OPC Client PC, the DCOM Default Impersonation Level is set to “Anonymous” instead of “Identify”, and the “ANONYMOUS LOGON” Access Control Entry (ACE) does not exist in the OPC Client PC, Access Control List (ACL) permissions in the System-Wide DCOM settings, Access Permissions, Edit Limits.
Repair
- Run OPC Expert on the remote computer you are trying to connect to
- Return to your original client computer
- Expand ‘Entire Network’
- Right click the remote computer your are trying to connect to
- Select ‘Import OPC servers’
- Import the OPC servers
- Data can be transferred via secure OPC UA connection,