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Status: Solved
Priority: Medium
Security: Public
Views: 5871
Last Modified: 2012-05-10

Error while running powershell script - Cannot bind argument to parameter 'Path' because it is null.

Hello,

I have one script for renaming homefolders and setting ACLs. It works on my personal laptop but not at work.
Gives me this error: "Cannot bind argument to parameter 'Path' because it is null.
At :line:5 char:11
+ (Get-Item <<<< $_.ColumnA).MoveTo($_.ColumnB)"

I know its probably some settings, but I cannot manage it.
I am running PowerGui script editor ver. 2.1.1.1202 .

Any idea?

Many thx

-------------------------------

$DomainName = "xxx"
$LogosDomain = "yyyy"

Import-CSV C:\users.csv | %{

$Folder = Get-Item $_.ColumnA

$NewFullName = $Folder.FullName -Replace $Folder.Name, $_.ColumnB

$Folder.MoveTo($NewFullName)

$ACL = Get-ACL $NewFullName

$AccessRule2 = New-Object Security.AccessControl.FileSystemAccessRule( `
"$LogosDomain\$($_.ColumnA)", @("Modify", "Synchronize"), @("ObjectInherit", "ContainerInherit"), "InheritOnly", "Allow")

$AccessRule = New-Object `
System.Security.AccessControl.FileSystemAccessRule(`
"$DomainName\$($_.ColumnB)",@("Modify","Synchronize"), @("ObjectInherit", "ContainerInherit"), "NoPropagateInherit", "Allow")

$ACL.RemoveAccessRuleAll($accessrule2)
$ACL.AddAccessRule($AccessRule)

Set-ACL $NewFullName -AclObject $ACL
}

Radim88

Asked: 2010-09-20

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1 Solution

LVL 71

Chris DentPowerShell DeveloperCommented: 2010-09-21

It reads like a problem in your input file rather than the script.

I suggest you Write-Host the values it's trying to use before you use them.

Chris

Radim88Author Commented: 2010-09-21

Hello, csv file looks like this :

ColumnA;ColumnB
C:\A;C
C:\B;D

------------------------

IF I RUN:

Import-CSV C:\test.csv

I GET:

ColumnA;ColumnB
---------------
C:\A;C
C:\B;D

BUT IT FAILS ON(Get-Item):

Import-CSV C:\test.csv | %{

$Folder = Get-Item $_.ColumnA

$NewFullName = $Folder.FullName -Replace $Folder.Name, $_.ColumnB

$Folder.MoveTo($NewFullName)

write $NewFullName
}

Many Thanks

LVL 71

Chris DentPowerShell DeveloperCommented: 2010-09-21

That's not a CSV file.

CSV is Comma Separated Values, your delimiter is a semi-colon.

You can either change that, or run Import-Csv like this:

Import-Csv C:\test.csv -Delimiter ";" | ....

Chris

Radim88Author Commented: 2010-09-21

Hi,

I dont know.
---------------------------------------------

Import-CSV C:\test.csv -Delimiter ";" | %{

$Folder = Get-Item $_.ColumnA

$Folder
}

--------------------

Cannot bind argument to parameter 'Path' because it is an empty string.
At :line:7 char:20
+ $Folder = Get-Item <<<< $_.ColumnA

LVL 71

Chris DentPowerShell DeveloperCommented: 2010-09-21

Run this bit on its own and check you get something useful back:

Import-CSV C:\test.csv -Delimiter ";"

It's entirely possible you have trailing blank lines as well.

Chris

Radim88Author Commented: 2010-09-21

Import-CSV C:\test.csv -Delimiter ";"

---------------------------------------

ColumnA ColumnB
------- -------
C:\A B

LVL 71

Chris DentPowerShell DeveloperCommented: 2010-09-21

Try this:

Import-Csv "C:\test.csv" -Delimiter ";" | ForEach-Object {
Write-Host "Path: '$($_.ColumnA)'"
Get-Item $_.ColumnA
}

See how many times it tells you about Path.

Chris

Radim88Author Commented: 2010-09-21

Path: ''
Cannot bind argument to parameter 'Path' because it is an empty string.
At :line:3 char:10
+ Get-Item <<<< $_.ColumnA

Radim88Author Commented: 2010-09-21

But it makes me crazy, i have at home installed server 2003 in virtual pc, I installed there powergui etc..
And it works.

LVL 71

Chris DentPowerShell DeveloperCommented: 2010-09-21

You have an empty line in your file.

You could work around that in PowerShell, but it's a problem in the file, not PowerShell.

Chris

Import-Csv "C:\test.csv" -Delimiter ";" | Where-Object { $_.ColumnA } | ForEach-Object {
  Write-Host "Path: '$($_.ColumnA)'"
  Get-Item $_.ColumnA
}

Open in new window

Radim88Author Commented: 2010-09-21

So do y think is there possible solution to remake script or should I use:

ren C:\A B | icacls c:\B /remove xx\yy /grant xx\yy:(OI)(CI)(M)

many thanks

Radim88Author Commented: 2010-09-21

by the way it gives me:

Path: 'C:\A'
Cannot find path 'C:\A' because it does not exist.
At :line:3 char:10
+ Get-Item <<<< $_.ColumnA

Path: 'C:\B'
Cannot find path 'C:\B' because it does not exist.
At :line:3 char:10
+ Get-Item <<<< $_.ColumnA

LVL 71

Chris DentPowerShell DeveloperCommented: 2010-09-21

I don't see a need to remake the script, there's really not very much to it.

> ren C:\A B | icacls c:\B /remove xx\yy /grant xx\yy:(OI)(CI)(M)

You don't really want a pipeline there, you're not passing anything along. You can just use:

ren C:\A B
icacls c:\B /remove xx\yy /grant xx\yy:(OI)(CI)(M)

And the error message... well if that path doesn't exist... I can't help you with that :)

Chris

Radim88Author Commented: 2010-09-21

Thanks :-) , I am an idiot. Let me ask you another question before I accept it.

ren C:\A B | icacls c:\B /remove xx\yy /grant xx\yy:(OI)(CI)(M)

I know it doesn't send an object via pipe. I only wanted to pass it into one line, I have about 600 homefolders and wanted to create a *.bat and run it at the same time.

Thanks again

Radim88Author Commented: 2010-09-21

thx

LVL 71

Chris DentPowerShell DeveloperCommented: 2010-09-21

If it's PowerShell you can pop things on a single line with ;. e.g.

Rename-Item C:\A B; DoOtherStuff

With Batch you can use &&. e.g.

ren C:\ B && icacls ...

Chris

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Error while running powershell script - Cannot bind argument to parameter 'Path' because it is null.

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