Hi John,
You could always use GetPoints method to check for tag name existance.
GetPoints returns a PointList object so you just use the Count as an indication if the tag exists.
If _server.GetPoints("tag='sinusoidd'").Count > 0 Then
'Point Exists
Else
'Point does not exist.
End IF
Rhys.
Principal Consultant
Real-Time Data Management @ Wipro Technologies