Hello Jimbo_Jones,

You have the DLL in the correct folders. You can remove the one copy that's in the folder with the Excel worksheet. What versions of LIMs, and Excel are you using? What make and model is the spectrometer? I am not expert in this area, but do know people who work with these systems. I doubt I can get an answer for you today, but I will try.

Sincerely,
Leith Ross