Issue with Script

Good Afternoon,

I have written a script to check directory names with corresponding directory names in the HomeDirectory attribute in Active Directory.  If they do not exist in Active Directory I would like the script to tell me.  Please can you take a look and tell me where I am going wrong, I am having issues and getting an error:

Insufficient hexadecimal digits.

#Add snap-in and connect to domain

Add-PSSnapin Quest.ActiveRoles.ADManagement | Out-Null
Connect-QADService 'domain.co.uk' | Out-Null

#Ask user for local location of new home directories

Read-Host "What is the location of the folder names?"

#Get list of folder names

$HomeDrives = Get-ChildItem $LocalHomeLocation | ?{ $_.PSIsContainer } | Select-Object Name, FullName

#Get home directories from Active Directory

$Server = Read-Host "Which server do the home directories exist on in AD?"

#Format response

$OriginalServer = "\\$Server*"

#Get list of users from AD that have a home drive on the original server

$HomeDriveUsers = Get-QADUser -SizeLimit 0 -SearchRoot 'domain.co.uk' -SearchScope Subtree | Where {$_.HomeDirectory -like $Server}

#Go through each user, checking each home directory in the user share to see if they have a matching name

ForEach ($HomeDriveFolder in $HomeDrives)
{
    $i = 0

    ForEach ($HomeDriveUser in $HomeDriveUsers)
    {
        if ([string]$HomeDriveFolder.Name -match [string]$HomeDriveUser.HomeDirectory)
        {
            $i = 1
        }
    }

    if ($i -eq 0)
    {
        Write-Host $HomeDriveFolder.HomeDirectory
    }
}