danke für den hinweis meistertogo...falls jemand das gleiche problem hat:
[autoit]$today = @MON & "-" & @MDAY & "-" & @YEAR ; obvious :p
[/autoit][autoit][/autoit][autoit]_DateTimeSplit(_DateAdd('d', -1, _NowCalcDate()),$yday,"")
[/autoit][autoit][/autoit][autoit]$ymonth = StringFormat("%02s",$yday[2])
$y2day = StringFormat("%02s",$yday[3])
$yyear = StringFormat("%02s",$yday[1])
$yesterday = $ymonth & "-" & $y2day & "-" & $yyear