Excel access denied with Standalone application

Hello,

I am using fopen to write the results of my programmation in excel.

I share my program making .exe

I never have any issue before except if the excel file was already open but from yesterday I have an error saying Permission denied.

here is my code

[fid,message] = fopen(strcat(chemin_acces,'\Excel Results\',Option.carsimu,'\','AutoSimu_SetUp.xlsx'),'a');

I have no issue when I am using the application with matlab but only when I use the exe file.

Is there any windows update or anything else which could create the issue?

Thanks in advance.