How do I fix the 'Mismatch Detected for 'RuntimeLibrary'' error in Visual C ?

Resolving "Mismatch Detected for 'RuntimeLibrary'" in Visual C

Many developers encounter the error "Mismatch Detected for 'RuntimeLibrary'" when trying to build a Visual C project. This error arises when multiple components of a program, such as libraries and source files, use different versions of the C RunTime (CRT) library.

To resolve this error, follow these steps:

1. Check Project Properties: Open the project properties for both the application and any linked libraries.
2. Navigate to Code Generation: Under C/C , select Code Generation.

3. Verify Runtime Library Settings: Ensure that the Runtime Library setting is identical for all components involved. Available options include:

   • Multithreaded Debug
   • Multithreaded Debug DLL
   • Multithreaded Release
   • Multithreaded Release DLL
4. Match Debug and Release Settings: Remember to check that these settings match for all project configurations, including debug and release builds.

In this specific case, it appears that the error is due to linking a library built with "Multithreaded Debug" statically against a program built using "Multithreaded Debug DLL" dynamically. To resolve this, change the Runtime Library setting in the application project to "Multithreaded Debug DLL."

Note that mixing different versions of the CRT library can lead to unexpected behavior and crashes. Therefore, it's crucial to maintain consistency across all components of a program to avoid such errors.

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