DDE Channel is opening, I am using following code to open channel.
OpenRSLinx = DDEInitiate("RSLINX", "Sandbox")
And the following to get data from processor.
rslinx = OpenRSLinx()
And this line returns error 2023
ValveName = DDERequest(rslinx, "Reals[" & i & "], L1, C1")
Excel places #REF! in the target cell.