Is there any way to not display the prompt or dialog in code?

When the picture has no subject, it will be prompted.I don't want to display it, because i want to run in silent mode.

I try to use "app.displayDialogs = DialogModes.NO;",but it didn't work,the code is here:

try{
     app.displayDialogs = DialogModes.NO;
     executeAction(stringIDToTypeID('autoCutout'), undefined, DialogModes.NO);
}catch(e){
     //not show error
}