Claim Based Move-SPUser UserNotFoundException

Hi Everyone, 
I'm running an Intra-Forest AD migration in Windows 2008 R2 Forest using ADMT 2.3. 
I'm creating a script to move SharePoint 2013 user's sites (Move-SPUser), this is a part of the script: 

$user1=Get-SPUser -Identity "i:0#.w|$($sourceDomain)\$($userName)" -Web "$website" -ErrorAction silentlycontinue
$user2=Get-SPUser -Identity "$($sourceDomain)\$($userName)" -Web "$website" -ErrorAction silentlycontinue
if($user1)
{
	$out=Move-SPUser -Identity $user1 -NewAlias "i:0#.w|$($targetDomain)\$($userName)" -confirm:$false -IgnoreSID
}
if($user2)
{
	$out=Move-SPUser -Identity $user2 -NewAlias "$($targetDomain)\$($userName)" -confirm:$false -IgnoreSID
}

The first Move-SPUser (claim-based) always fails with the following error: 

An error was encountered while retrieving the user profile.
    + CategoryInfo          : InvalidData: (Microsoft.Share...PCmdletMoveUser:SPCmdletMoveUser) [Move-SPUser], UserNot
   FoundException
    + FullyQualifiedErrorId : Microsoft.SharePoint.PowerShell.SPCmdletMoveUser
    + PSComputerName        : shpserver.contoso.com

What do you think might go Wrong in the first Move-SPUser?

Thanks.