Task failed because AL.exe was not found,

Question

I\'m getting the following error when compiling my project:

Task failed because "AL.exe" was not found, or the correct Microsoft Windows SDK is

Answer 1

You are getting this error because you are building a 3.5 project that uses an assembly manifest, but do not have the 3.5 tools installed. (Hopefully, someone can provide more information.)

I strongly recommend installing Microsoft Windows SDK for Windows 7 and .NET Framework 3.5 SP1 and avoid the hacks, especially when you only need to install the tools, and be sure to check out the release notes for AL.exe information. (This SDK is the recommended installation for 3.5 due to a security update fix.)

The "Release Notes" for the SDK indicates that ALTOOLPATH is set by Visual Studio 2005, which might explain why some user have problems building. This is a guess on my part.

Using SysInternals' Process Monitor, when building a 3.5 project, Visual Studio 2008 looks in the %SystemRoot%\Microsoft.NET\Framework\v3.5 folder for the Assembly Linker (AL.exe). Failing to find AL there, it will use the location specified in the specific v6.0A registry setting. (Note that v6.0A is not for .NET 3.5.) Therefore, install the proper software and do not hack. :O)

The question I have is the Assembly Linker different between 2.0, 3.0, and 3.5?

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Windows SDK for Windows Server 2008 and .NET Framework 3.5

Installing the newly released Microsoft Windows SDK for Windows 7 and .NET Framework 3.5 SP1 instead of this release is recommended. If you do go ahead and install this SDK after VS2008 SP1, please ensure the patch described in Knowledge Base 974479 is applied. See Overview section for more information.