By using the DisplayAlerts property (Application.DisplayAlerts = False)
So it should be like : 
$Excel->{DisplayAlerts} = "False"
$Book_Schedule->SaveAs("$file");
$Excel->{DisplayAlerts} = "True"
$Book_Schedule->Close;

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In reply to Re: execution of program without dialogue prompting up. by nikosv
in thread execution of program without dialogue prompting up. by Mr_monk

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