Powershell Script causing Access Export corruption?

so, i've been told maintainers of report use daily little script below causing data corrupted (i.e. first 20 rows of data, including headers, missing). possible?

$cpath = "<the path>"  $mpath = "<the destination>"  $timecheck = 1  while($timecheck -lt 90){  	$lastc = (get-itemproperty -path $cpath).lastwritetime  	$lastm = (get-itemproperty -path $mpath).lastwritetime  	if ($lastc -gt $lastm) {  		start-sleep -s 30  		copy-item $cpath -destination $mpath  				  		$a = new-object -comobject wscript.shell  		$b = $a.popup("files have been copied!",0,"files copied",1)  		  		$timecheck = 100  	}  	else {  	start-sleep -s 60  	$timecheck = $timecheck++  	}  }

have scheduler launch 5 minutes before file "expected" updated. i'm missing fundamental understanding, insight appreciated.

ok, decided re-write foreach method.

foreach($i in 1..90){ 	start-sleep -s 60     	c:\ps\copycc.ps1 }

where copycc.ps1 contains latswritetime checks , copy information. works (so far!). need try add copycc.ps1 code block foreach code block, can add snippet turn off foreach. :) i'll see how works , post findings.

Windows Server  >  Windows PowerShell