"0x00000050" Stop error when an x86-based version of an application runs on a Windows Server 2012-based server

Applies to: Windows Server 2012 DatacenterWindows Server 2012 DatacenterWindows Server 2012 Standard


Assume that you try to run an x86-based version of an application on a Windows Server 2012-based server. You receive a Stop error message that resembles the following, if the application uses MPIO Pass Through IOCTLS.

STOP: 0x00000050 ( parameter1, parameter2, parameter3, parameter4 )

  • This Stop error indicates a PAGE_FAULT_IN_NONPAGED_AREA issue.
  • The parameters in this Stop error message vary, depending on the configuration of the computer.
  • Not all "0x00000050" Stop errors are caused by this issue.


This issue occurs when MPIO marshals the data buffer for the MPIO Pass Through IOCTL from the x86-based version of the system to the x64-based version. This occurs because of the incorrect interpretation of the x86-based IOCTL Input Buffer and an incorrect calculation of the size required for the x64-based version buffer.

How to obtain this update or hotfix

To resolve this issue, we have released hotfixes and updates for Windows Server 2012.

The update rollup fixes many other issues in addition to the issue that the hotfix fixes. We recommend that you use the update rollup. The update rollup is larger than the hotfix. Therefore, the update rollup takes longer to download.

Update for Windows Server 2012

The following update rollup is available.

For Windows Server 2012

Get update rollup 2975331

Hotfix for Windows Server 2012

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem.

If the hotfix is available for download, there is a "Hotfix Download Available" section at the top of this Knowledge Base article. If this section does not appear, submit a request to Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft website: Note The "Hotfix Download Available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.


There are no prerequisites for installing this hotfix.

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.

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.
For more information about MPIO I/O control codes, go to the following Microsoft website:


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