Using Excel while running Matlab with ActiveX conflict

Hello everybody!

My MATLAB code use ActiveX to read and write from and into an Excel file. This code takes some minutes to be done, since in the meantime other stuff are computed. The problem is that if I run the code and in the meantime I also use Excel to do other stuff, it seems like there is a conflict between the two of them. I think that is beacuse the ActiveSheet changes while I am using other Excel files.

Is there a way to avoid that?

Thank you in advance!