Hi there, I'm new to writing interfaces using the PISDK (Note, due to corporate desktop model we do not have access to the PI AF SDK). I have written a simple interface which retrieves all tags for a specific PointSource into a PointList object. The interface reads data from a device specific CSV file which is then written to the appropriate tags in PI. I am having difficulty dealing with underlying COM architecture of the PISDK, specifically locating the InstrumentTag for the tag I need within the PointList. For want of a better solution, I currently iterate through the PointList comparing the InstrumentTag in the data against each InstrumentTag contained in the PointList. I am sure there is a more efficient way of doing this, but I can't for the life of me find it within the documentation, or from looking at the methods available via the PointList object. Assistance would be much appreciated.