IDEC WindSRV - Manual (Page 42)

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Each method (such as, GetErrorString) of every OPC Data Access 1.0, 2.0 and 3.0 interface (such as, IOPCCommon)
supported by the server is available as a filter. Users can select a method by clicking the checkbox to the left of the
method name. Additionally, users can select all methods of an interface by double-clicking the interface name. By
default, all methods for all interfaces are selected.
Note: Filter changes apply only to new events captured. Previous events that meet the filter criteria will not be
removed from the view.
The Options Dialog is used to control certain functionality built into the OPC diagnostics feature.
Remember that the performance of the server is affected by capturing diagnostic information, as it is an additional layer
of processing that occurs between all client/server communications. The OPC diagnostic information is saved to the
installation directory under the file name autosave.opcdiag. The file is only created on shutdown. This functionality is
turned off by default.
Users can also decide whether of not to persist OPC diagnostic information to disk when the server is shutdown by
selecting the Preserve diagnostics to disk on shutdown. This can be useful if users need to go back in time to
determine where a particular issue may have occurred. Users can also create a backup of diagnostics data at any time
through the File | Save As menu option. By default, this functionality is turned on.