Error message 0x80004002 when trying to access objects under an OPC server in the Vista OPC tool

Issue

Get error message 0x80004002 when trying to access objects under an OPC server in the Vista OPC tool.
It is possible to see the OPC server but get the error when accessing the object under it.

Product Line

TAC Vista

Environment

  • Vista 5.1.5
  • Vista OPC tool

Cause

For some reason some important DLLs for OPC were not registered on the client PC.

Resolution

Register the following DLLs:

  • opccomn_ps.dll
  • opc_aeps.dll
  • opchda_ps.dll
  • opcproxy.dll