I found that one also. It was based on ver 3.21 if I remember correctly. Many of the functions had been removed. I was able to get some help and get around my DCOM issues with our OPC server. I will probably just stick with that until there is a native driver available. Besides, from what I am learning about Siemens, the number of connections is critical. It may be advantageous to use the OPC server since it is already in place for shop floor applications. Thanks for the suggestion.