i have sent an email to the provided email address - thank you.
i modified my application to create and use a parameterless DANodeFilter. the results of the BrowseNodes was the same as the parameterized DANodeFilter - the count of the DANodeElementsCollection was 0.

the 'problematic' OPC Server is SISCO's "UIB Adapter for OPC Client". this adapter has two components - a "UIB HSDA Client" and an "OPC DA Server".

screenshots contain some confidential information (partial model layout). please provide an email address to which i can send screenshots.

private void button10_Click (object sender, EventArgs e)
{
// BROWSE

try
{
Console.WriteLine ("BROWSE mach name: {0}; server ProgID: {1}",
comboBox1.Text, comboBox2.Text);

Debug.Assert (comboBox1.Text != null); // machine name
Debug.Assert (comboBox2.Text != null); // server ProgID

easyDAClient1.Timeouts.BrowseAccessPaths = 10000;
easyDAClient1.Timeouts.BrowseNodes = 10000;
easyDAClient1.Timeouts.BrowseProperties = 10000;
easyDAClient1.Timeouts.BrowseServers = 10000;

DANodeFilter danf = new DANodeFilter ()
{
BrowseFilter = DABrowseFilter.All,
AccessRightsFilter = DAAccessRights.Both,
DataTypeFilter = VarType.Empty,
ElementNameFilter = "",
VendorFilter = ""
};
DANodeElementCollection NEcoll0 =
easyDAClient1.BrowseNodes (comboBox1.Text, comboBox2.Text, "", danf);

DANodeElementCollection NEcoll1 =
easyDAClient1.BrowseBranches (comboBox1.Text, comboBox2.Text);

DANodeElementCollection NEcoll2 =
easyDAClient1.BrowseLeaves (comboBox1.Text, comboBox2.Text);

daItemDialog1.ServerDescriptor.MachineName = comboBox1.Text;
daItemDialog1.ServerDescriptor.ServerClass = comboBox2.Text;

if (daItemDialog1.ShowDialog () == DialogResult.OK)
{
Debug.Assert (daItemDialog1.NodeElement != null);
browsedItemName.Text = daItemDialog1.NodeElement.ItemId;
}
}
catch (Exception ex)
{
MessageBox.Show (ex.Message);
}
}
i will also provide a screenshot that shows the values for NEcoll0, NEcoll1 and NEcoll2 after executing the above code.

yes, the same application is being used. the daItemDialog is part of the function above.

no 'plus' next to root, and there are not any error indications. a screenshot will be provided.
thank you for your help!

i have also tried BrowseNodes of server1 (with an 'empty' nodeFilter), and DANodeElementCollection count was 0.

i am using daItemDialog to browse an opc server (call it server1). when i try to browse it the dialog box indicates "(root)" for the branch with nothing under it, and "(no items)" for the leaves with nothing under it.

i can successfully browse server1 with the matrikon opc explorer, and display tag values. the tag ("Item ID") displayed was "PhysModel:xxxx/abc def/ghijkl/mnop:AnalogValue.value"

i can successfully use my daItemDialog to browse the matrikon opc server for simulation (call it server2) that i have running. the tag displayed was "Random.Real4"

when i BrowseBranches of server2, i see {Simulation Items} and {Configured Aliases}, which agrees with what my daItemDialog shows.

when i BrowseBranches of server1, i see a count of 1 and {PhysModel:xxx}.

when i BrowseLeaves of server2, i see {@clients} and {#MonitorACLFile}.

when I BrowseLeaves of server1, i see a count of 0 and no leaves.

is there some other way i need to browse server1? thank you for your assistance.