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Question

I've got this function, that move a directory to inside another directory, but always gives me the access denied error.

Any idea what am i doing wrong?

Get-ChildItem C:\Scripts\MetadataExport -Directory | ForEach-Object {
    # this will look for a 4-12 digit number in the directory name
    If ($_.Name -match '(?:\b|\D)(\d{4,12})(?:\b|\D)') {
        $destPath = Join-Path $_.Parent.Fullname $Matches[1]

        If (-not (Test-Path -LiteralPath $destPath)) {
            New-Item $destPath -ItemType Directory
        }

        Move-Item -LiteralPath $_.Fullname -Destination $destPath -Force
    }
} 

the error:

   Move-Item : Access to the path 'C:\Scripts\MetadataExport\kwakwala-rosenblum-0172' is denied.
   At C:\Users\User\Documents\ScripsPS1\MetadataExport.ps1:170 char:9
     Move-Item -LiteralPath $_.Fullname -Destination $destPath -Fo ...
     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  CategoryInfo          : WriteError: (C:\Scripts\Meta...-rosenblum-0172:DirectoryInfo) [Move-Item], IOException
+ FullyQualifiedErrorId : MoveDirectoryItemIOError,Microsoft.PowerShell.Commands.MoveItemCommand

So, the goal is to move every folder that part of the name matches with another folder with numeric name.

Ex:

The 'kwakwala-rosenblum-0172' folder needs to move to inside '0172' folder. Just move if the Literal-Path is the same as folder's name.

Answer 1

I am not sure what you are trying to do but you effectively try to move a folder to a folder with the same name:

$Null = New-Item -Path .\0172 -ItemType Directory -Force
$Null = New-Item -Path .\kwakwala-rosenblum-0172 -ItemType Directory -Force
Get-ChildItem -Directory | Foreach-Object {
    if ($_.Name -Match '(?:\b|\D)(\d{4,12})(?:\b|\D)') {
        $destPath = Join-Path $_.Parent.Fullname $Matches[1]
        Write-Host $_.Fullname '-->' $destPath
    }
}

C:\..\0172 --> C:\..\0172
C:\..\kwakwala-rosenblum-0172 --> C:\..\0172

Which is the same as doing this:

Move-Item -LiteralPath .\0172 -Destination .\0172 -force

Move-Item: The process cannot access the file because it is being used by another process.

Meaning that this would likely "resolve" the issue:

if ($_.Fullname -ne $destPath) {
    Move-Item -LiteralPath $_.Fullname -Destination $destPath -Force
}

But, I am not sure what your expectation is.
You might want to explain ( in the question ) how you expect the subfolders to be (re)named.