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Updates as per Aarti
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---
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title: UMDH in Windows 11 SDK Doesn't Work Fine
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title: The UMDH Tool Generates Warnings
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description: Provides a workaround for an issue where umdh.exe in Windows 11 SDK doesn't work fine.
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ms.date: 02/19/2025
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ms.reviewer: hirotoh, v-sidong
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ms.custom: sap:Component Development\COM, DCOM, and COM+ Programming and Runtime
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---
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# UMDH in Windows 11 SDK doesn't work properly
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# The UMDH tool generates warnings
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This article describes a known issue with the [User-Mode Dump Heap (UMDH)](/windows-hardware/drivers/debugger/umdh) tool that is installed with the [Debugging Tools for Windows](/windows-hardware/drivers/debugger/extra-tools). The issue applies to the tool included in the Windows SDK for Windows 11, Windows Driver Kit for Windows 11, and standalone toolset.
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## Symptoms
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When you use the [User-Mode Dump Heap (UMDH)](/windows-hardware/drivers/debugger/umdh) tool (also known as **umdh.exe**) in the Windows 11 SDK, the following error message occurs:
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When the [UMDH](/windows-hardware/drivers/debugger/umdh) (also known as **umdh.exe**) tool executes, it displays the following messages and fails to capture the memory allocations.
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```output
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Warning:
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## Cause
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This behavior is a bug.
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This is a bug in the UMDH tool included in the Windows SDK for Windows 11 and Windows Driver Kit for Windows 11.
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## Workaround
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To work around the issue, use UMDH in the Windows 10 SDK.
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To work around the issue, install the [latest version of Windows SDK for Windows 10](https://developer.microsoft.com/windows/downloads/sdk-archive/) or [Windows Driver Kit for Windows 10}(/windows-hardware/drivers/other-wdk-downloads) and use the UMDH in it.

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