Option Explicit Main Sub Main On Error Resume Next Dim oCluster Dim oTestRes Dim sCluster Set oCluster = CreateObject("MSCluster.Cluster") sCluster = InputBox( "Cluster to open?" ) oCluster.Open( sCluster ) Set oTestRes = oCluster.Resources.Item("Dummy") oTestRes.Delete() If Err.Number <> 0 Then If Err.Number = 424 Then MsgBox "Dummy resource does not exist!" Else MsgBox "Error return is " & Err.Number End If End If ' This will return "Invalid procedure call or argument" if the resource ' does not exist! End Sub