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  2. $MyInvocation.MyCommand object is set to null when you run the script by using PowerShell 3.0 in Windows 8 or in Windows Server 2012

$MyInvocation.MyCommand object is set to null when you run the script by using PowerShell 3.0 in Windows 8 or in Windows Server 2012

View products that this article applies to.

Symptoms

Consider the following scenario:
  • You have some custom PowerShell scripts or modules that contain a reference to the built-in $MyInvocation instance.
  • You execute the scripts or modules on a Windows 8-based or Windows Server 2012-based computer by using Windows PowerShell 3.0.
  • Some objects are passed through a pipe.
In this scenario, the value of the $MyInvocation.MyCommand object is set to null.

For example, the issue occurs when you run the following script:
$Line= Get-Content $file
$Line | foreach-Object { 
write-host "** MYCOMMAND [2] IS NULL?: " ($MyInvocation.MyCommand -eq $null) " --->" $_
}
Note This issue does not occur when you run the script by using Windows PowerShell 2.0.

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Resolution

Hotfix information
A supported hotfix is now available from Microsoft. However, it is intended to correct only the problem that this article describes. Apply it only to systems that are experiencing this specific problem.

To resolve this problem, contact Microsoft Customer Support Services to obtain the hotfix. For a complete list of Microsoft Customer Support Services telephone numbers and information about support costs, visit the following Microsoft website:
http://support.microsoft.com/contactus/?ws=support
Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

Prerequisites

To apply this hotfix, you must be running Windows 8 or Windows Server 2012.

Registry information

To use the hotfix in this package, you do not have to make any changes to the registry.

Restart requirement

You must restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace a previously released hotfix.

File information

The global version of this hotfix installs files that have the attributes that are listed in the following tables. The dates and the times for these files are listed in Coordinated Universal Time (UTC). The dates and the times for these files on your local computer are displayed in your local time together with your current daylight saving time (DST) bias. Additionally, the dates and the times may change when you perform certain operations on the files.





Windows 8 and Windows Server 2012 file information notes
Important Windows 8 hotfixes and Windows Server 2012 hotfixes are included in the same packages. However, only "Windows 8" is listed on the Hotfix Request page. To request the hotfix package that applies to one or both operating systems, select the hotfix that is listed under "Windows 8" on the page. Always refer to the "Applies To" section in articles to determine the actual operating system that each hotfix applies to.
  • The files that apply to a specific product, milestone (RTM, SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table:

    VersionProductMilestoneService branch
    6.2.920 0.16 xxxWindows 8 and Windows Server 2012RTMGDR
    6.2.920 0.20 xxxWindows 8 and Windows Server 2012RTMLDR
  • GDR service branches contain only those fixes that are widely released to address widespread, critical issues. LDR service branches contain hotfixes in addition to widely released fixes.
  • The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are listed separately in the "Additional file information for Windows 8 and Windows Server 2012" section. MUM and MANIFEST files, and the associated security catalog (.cat) files, are extremely important to maintain the state of the updated components. The security catalog files, for which the attributes are not listed, are signed with a Microsoft digital signature.
For all supported x86-based versions of Windows 8
File nameFile versionFile sizeDateTimePlatform
System.management.automation.dll6.2.9200.166265,194,75230-May-201300:53x86
System.management.automation.dll6.2.9200.207315,194,75230-May-201306:01x86
For all supported x64-based versions of Windows 8 and of Windows Server 2012
File nameFile versionFile sizeDateTimePlatform
System.management.automation.dll6.2.9200.166265,194,75230-May-201302:50x86
System.management.automation.dll6.2.9200.207315,194,75230-May-201307:54x86

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To resolve this issue, install update rollup 2855336, or install the hotfix that is described in this article. This hotfix is also available at Microsoft Update Catalog.

Update information

For more information about how to obtain update rollup 2855336, click the following article number to view the article in the Microsoft Knowledge Base: 
2855336 Windows RT, Windows 8, and Windows Server 2012 update rollup: July 2013



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Workaround

To work around this issue, do not use a pipe to pass the objects. For example, you can change the example script to the following: 
$Line= Get-Content $file
foreach( $L in $Line){ 
write-host "** MYCOMMAND [2] IS NULL?: " ($MyInvocation.MyCommand -eq $null) " --->"$L 
}

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Status

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

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More Information

For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:
824684 Description of the standard terminology that is used to describe Microsoft software updates
Additional file information

Additional file information for Windows 8 and Windows Server 2012

Additional files for all supported x86-based versions of Windows 8
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Date (UTC)30-May-2013
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PlatformNot applicable
File nameMsil_system.management.automation_31bf3856ad364e35_6.2.9200.20731_none_82964ca5a6d2620a.manifest
File versionNot applicable
File size1,718
Date (UTC)30-May-2013
Time (UTC)06:11
PlatformNot applicable
File nameX86_0069cc1d935f52105e189e37ad3d3c48_31bf3856ad364e35_6.2.9200.16626_none_732d49d23ba3aebb.manifest
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Date (UTC)30-May-2013
Time (UTC)15:28
PlatformNot applicable
File nameX86_04d1fcf53a2eb0f5a62016f97b15f4ab_31bf3856ad364e35_6.2.9200.16626_none_c69da1ec2767ada5.manifest
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File size685
Date (UTC)30-May-2013
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File nameX86_1241b0d382e6bf3603f61b64e9af862f_31bf3856ad364e35_6.2.9200.20731_none_097e5bed0bc97c91.manifest
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Time (UTC)15:28
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File size685
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File nameX86_512ded43940eb8acc29e99405fd6830f_31bf3856ad364e35_6.2.9200.16626_none_cef320d83bc0c870.manifest
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File size685
Date (UTC)30-May-2013
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File size685
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File nameX86_9af58ad204db7f5f3bac4409dff8aab7_31bf3856ad364e35_6.2.9200.20731_none_e0fa6c2c89023b18.manifest
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File nameX86_b7d70cabd55d7536679e131da2bb22da_31bf3856ad364e35_6.2.9200.16626_none_180d68323a097f3a.manifest
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File nameX86_bf14b3d5846f7c88f4af24011912827c_31bf3856ad364e35_6.2.9200.20731_none_3d4a21756ec54fb9.manifest
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File nameX86_bf9348f555a3a94c1f6c5f0dc95f353b_31bf3856ad364e35_6.2.9200.16626_none_619d841c1882c600.manifest
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File size685
Date (UTC)30-May-2013
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File nameX86_ca1bc2fb2ef088a4efd46c51a82bde00_31bf3856ad364e35_6.2.9200.20731_none_ecfd141b9e37f93d.manifest
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File nameX86_cd429c9e15ee381c26a5e0baf4827c83_31bf3856ad364e35_6.2.9200.16626_none_b30938dc97b031b4.manifest
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File nameX86_df0cfec14a8238c163c13c58cc81a786_31bf3856ad364e35_6.2.9200.16626_none_521fa78c897a8660.manifest
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File nameX86_df3ebc3a731bf6deb672200943c6478e_31bf3856ad364e35_6.2.9200.20731_none_3bb8c22416c8b2b6.manifest
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Date (UTC)30-May-2013
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File nameX86_e2c64b7dcfafaf4972521c5451fe0969_31bf3856ad364e35_6.2.9200.20731_none_887f185e8a562310.manifest
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File size685
Date (UTC)30-May-2013
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File nameX86_eec6c535ad67563dd8b8f6ac043dfe2b_31bf3856ad364e35_6.2.9200.20731_none_f6f2c548ec0797fa.manifest
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File size685
Date (UTC)30-May-2013
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File nameX86_f62187109141bad6db8b1238954791e1_31bf3856ad364e35_6.2.9200.16626_none_789c8cd06e1e9b9f.manifest
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File size685
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Additional files for all supported x64-based versions of Windows 8 and of Windows Server 2012
File nameAmd64_0069cc1d935f52105e189e37ad3d3c48_31bf3856ad364e35_6.2.9200.16626_none_cf4be555f4011ff1.manifest
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File size687
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File nameAmd64_04d1fcf53a2eb0f5a62016f97b15f4ab_31bf3856ad364e35_6.2.9200.16626_none_22bc3d6fdfc51edb.manifest
File versionNot applicable
File size687
Date (UTC)30-May-2013
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Time (UTC)08:09
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Keywords: kb, kbqfe, kbhotfixserver, kbfix, kbsurveynew, kbexpertiseadvanced, kbautohotfix

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Article Info
Article ID : 2830615
Revision : 1
Created on : 1/7/2017
Published on : 7/10/2013
Exists online : False
Views : 339