Bad February 28, 2023, 07:29:27 AM Hi again,After my first issue, i share you the second one for now if you have any solution.With MSDial v3.12 and 4.70, i have issue with the ion selected by the software.For exampleHere, you can see a part of my .msp file.MSDial can identify my compound, but use one strange mass for extract the areaWhy MSDial choose this mass ?Is it possible to limit the mass selection with mass present in our mass spectrum ?Thanks again for your help,regards