Finding the solution for Windows Error Code 9009 is only another click away. Read the following article on solving Windows Error Code 9009 in order to finally get rid of it.
This is a “post build manifest” error. You may see this error when using the Assembly Registration tool in a pre- or post-build project in Microsoft Visual C#. the error may also appear upon a faulty installation, or when copying files in Windows Vista.
What the experts recommended
The 9009 error code may be associated with a rebuild in Visual Studio 2005 with the FxCopCmd in the post-build event command line. It may be the result of an improper script execution, or the failure to copy or install a file. The problem may be the result of an invalid registry entry or a corrupt driver.
To address the problem, add the Manifest Tool (mt.exe) to the system path. You may also try adding the xcopy code in a batch file, and then put that batch file in the target directory where the assembly is being copied. Then, modify the post build event to call the DLL.
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