Still celebrating National IT Professionals Day with 3 months of free Premium Membership. Use Code ITDAY17

Solved

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

Posted on 2010-09-20

1 solution

Medium Priority

5,370 Views

Last Modified: 2012-05-10

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
}

Comment

Question by:Radim88

[X]

Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

Help others & share knowledge
Earn cash & points
Learn & ask questions

Join The Community

16 Comments

LVL 71

Expert Comment

by:Chris Dent

ID: 337232292010-09-21

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

Author Comment

by:Radim88

ID: 337240182010-09-21

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

Expert Comment

by:Chris Dent

ID: 337240252010-09-21

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

Author Comment

by:Radim88

ID: 337244772010-09-21

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

Expert Comment

by:Chris Dent

ID: 337245312010-09-21

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

Author Comment

by:Radim88

ID: 337245762010-09-21

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

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

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

LVL 71

Expert Comment

by:Chris Dent

ID: 337246132010-09-21

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

Author Comment

by:Radim88

ID: 337246562010-09-21

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

Author Comment

by:Radim88

ID: 337246742010-09-21

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

Expert Comment

by:Chris Dent

ID: 337246772010-09-21

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

Author Comment

by:Radim88

ID: 337248132010-09-21

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

Author Comment

by:Radim88

ID: 337248572010-09-21

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

Accepted Solution

by:Chris Dent

Chris Dent earned 1000 total points

ID: 337248792010-09-21

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

Author Comment

by:Radim88

ID: 337249492010-09-21

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

Author Closing Comment

by:Radim88

ID: 337249812010-09-21

thx

LVL 71

Expert Comment

by:Chris Dent

ID: 337250352010-09-21

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

Featured Post

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Security Patches - To Patch or Not to Patch? - That is the question!

Article by: Andrew

I was prompted to write this article after the recent World-Wide Ransomware outbreak. For years now, System Administrators around the world have used the excuse of "Waiting a Bit" before applying Security Patch Updates. This type of reasoning to me …

Get Report on Inbox Rules set to forward or redirect emails

Article by: Sunil

There are times when we need to generate a report on the inbox rules, where users have set up forwarding externally in their mailbox. In this article, I will be sharing a script I wrote to generate the report in CSV format.

Introduction to PHP: Building the Form

Video by: Jason

The viewer will learn how to create a basic form using some HTML5 and PHP for later processing. Set up your basic HTML file. Open your form tag and set the method and action attributes.: (CODE) Set up your first few inputs one for the name and …

How to access multiple mailboxes from one account in MS Exchange Server 2010 - video tutorial

Video by: Adam

There are cases when e.g. an IT administrator wants to have full access and view into selected mailboxes on Exchange server, directly from his own email account in Outlook or Outlook Web Access. This proves useful when for example administrator want…