C Run-Time Error R6034
This page is specific to:.NET Framework Version:
2.03.03.54
Visual C++ Concepts: Building a C/C++ Program
C Run-Time Error R6034

Error Message

An application has made an attempt to load the C runtime library without using a manifest. This is an unsupported way to load Visual C++ DLLs. You need to modify your application to build with a manifest. For more information, see the "Visual C++ Libraries as Shared Side-by-Side Assemblies" topic in the product documentation.

Applications must use a manifest to load the C runtime library. For more information, see Visual C++ Libraries as Shared Side-by-Side Assemblies and Manifest Generation in Visual Studio.

In release builds, the diagnostic message reads: "An application has made an attempt to load the C runtime library incorrectly. Please contact the application's support team for more information."

To correct this error

  • Rebuild your application with a manifest. Building an application with Visual Studio automatically puts the manifest into the resulting EXE or DLL file. If you are building at the command line, use the mt.exe tool to add the manifest as a resource. Use resource ID 1 if building an EXE, 2 if building a DLL. For more information, see How to: Embed a Manifest Inside a C/C++ Application.

Community Content

Migrated to VS2008. Everything compiles, but does not run
Added by:Kurien Mathew
https://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=362837
Manifest being included...
Added by:HYPACK
I am creating a DLL with VS2005 and the Manifest is being embedded, yet I am still getting a R6034. What next?
Regarding C Run-Time Error R6034
Added by:S. Kostrov
Microsoft's recommendation is very confusing. That is, it recommends to include a manifest file and to re-compile the project.

I recently had a problem with 'R6034' error message even with a manifest file already included!

In my case, Visual Studio 2005 compiles and builds a DEBUG-configuration of some DLL. But, as soon as I try to start an
application that uses that DLL the loader can't load the DLL and displays an error message with error code 'R6034'.

It happened because two Run-Time DLLs were referenced in my DLL by some reason! As soon as I looked
inside of my DLL I found two strings: 'msvcr80d.dll' and 'msvcr80.dll', and the 2nd one is the reason of that run-time problem.

In order to resolve the problem I added 'msvcrt.lib' to the list of ignored libraries for DEBUG-configuration:

[Configuration Properties] -> [Linker] -> [Input] -> 'Ignore Specific Library' - msvcrt.lib
No external manifest
Added by:swave
Additional to embedding a manifest file make sure that there is no external manifest file for this application. Otherwise the CRT.manifest will be searched in the application's directory and will most probably fail as this is not there.

In my case of a R6034 I just had to remove the external manifest and it started up OK.
dll conflict
Added by:thanchu
Two Run-Time DLLs were referenced in my DLL. When I delete one dll, the error is corrected. I think my DLL don't know to use what function that is declared in both of them.
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