The TOP Server has a number of Optional settings to help you connect with the OPC Client Application of your choice.  In the File | Project Properties menu, the following two tabs are shown. 

If you are having problems connecting with your OPC Client, normally the issue is DCOM configuration and you can see our DCOM help resources here for more help.  The TOP Server OPC Options can be used to fine tune and add features if your Client Application will support them. In most cases it is not required to modify these from the default settings.

OPC Settings

OPC Compliance