Visual Studio wants to build with wrong platform toolset

I have upgraded a solution from VS2010 to VS2012. I did that with other solutions, and it worked fine. But now when I tried to build the updated solution, the compiler tells me: ``` Error 1596 error MSB8020: The builds tools for Visual Studio 2010 (Platform Toolset = 'v100') cannot be found. To build using the v100 build tools, either click the Project menu or right-click the solution, and then select "Update VC++ Projects...". Install Visual Studio 2010 to build using the Visual Studio 2010 build tools. C:\Program Files (x86)\MSBuild\Microsoft.Cpp\v4.0\V110\Microsoft.Cpp.Platform.targets 42 5 praat3 ``` I don't know why the compiler tries to use VS2010. In the project property pages, I see under "Debug source files" the following entries: ``` C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\crt\src\ C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\atlmfc\src\mfc\ etc. ``` Also, if I set the "Platformtoolset" to "Inherit from project above or project standard", it defaults to "v100". I think this is the best hint about what goes wrong here. By accident I managed to open up the Microsoft.Cpp.Platform.targets file, and I see that v90 and v100 are listed there, but not v110. Could somebody who uses only VS2012 perhaps have a look at that file? This is what it looks like for me: ``` <!-- *********************************************************************************************** Microsoft.Cpp.Platform.targets WARNING: DO NOT MODIFY this file unless you are knowledgeable about MSBuild and have created a backup copy. Incorrect changes to this file will make it impossible to load or build your projects from the command-line or the IDE. This file defines the steps/targets required to build Visual C++ projects specifically on x86 platforms. Copyright (C) Microsoft Corporation. All rights reserved. *********************************************************************************************** --> <Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003"> <PropertyGroup> <ToolsetTargetsFound Condition="Exists('$(VCTargetsPath)\Platforms\$(Platform)\PlatformToolsets\$(PlatformToolset)\Microsoft.Cpp.$(Platform).$(PlatformToolset).targets')">true</ToolsetTargetsFound> <VCTargetsPathEffective Condition="'$(ToolsetTargetsFound)' == 'true'">$(VCTargetsPath)</VCTargetsPathEffective> </PropertyGroup> <!-- Import Before --> <Import Condition="Exists('$(VCTargetsPath)\Platforms\$(Platform)\ImportBefore')" Project="$(VCTargetsPath)\Platforms\$(Platform)\ImportBefore\*.targets"/> <!-- Import platform toolset file if found in this version --> <Import Condition="'$(ToolsetTargetsFound)' == 'true'" Project="$(VCTargetsPath)\Platforms\$(Platform)\PlatformToolsets\$(PlatformToolset)\Microsoft.Cpp.$(Platform).$(PlatformToolset).targets" /> <!-- Try to find the toolset in older versions --> <Import Condition="'$(ToolsetTargetsFound)' != 'true' and '$(MinSupportedVCTargetsVersion)' != 'v110'" Project="Microsoft.Cpp.Platform.Redirect.targets" /> <PropertyGroup> <PrepareForBuildDependsOn>PlatformPrepareForBuild;$(PrepareForBuildDependsOn)</PrepareForBuildDependsOn> </PropertyGroup> <Target Name="PlatformPrepareForBuild" DependsOnTargets="$(PlatformPrepareForBuildDependsOn)"> <PropertyGroup> <ConfigurationPlatformExists Condition="'%(ProjectConfiguration.Identity)' == '$(Configuration)|$(Platform)'">true</ConfigurationPlatformExists> </PropertyGroup> <!-- Error out when building an platform that is not set in the project file --> <VCMessage Code="MSB8013" Type="Error" Arguments="$(Configuration)|$(Platform)" Condition="'$(DesignTimeBuild)'!='true' and '$(ConfigurationPlatformExists)' != 'true'"/> <!-- Check if toolset exists in Visual Studio 2010 or Dev11 --> <VCMessage Code="MSB8020" Type="Error" Arguments="$(_PlatformToolsetShortNameFor_v100);$(PlatformToolset)" Condition="'$(DesignTimeBuild)'!='true' and '$(ToolsetTargetsFound)' != 'true' and '$(PlatformToolset)' == 'v100'" /> <VCMessage Code="MSB8020" Type="Error" Arguments="$(_PlatformToolsetShortNameFor_v90);$(PlatformToolset)" Condition="'$(DesignTimeBuild)'!='true' and '$(ToolsetTargetsFound)' != 'true' and '$(PlatformToolset)' == 'v90'" /> <VCMessage Code="MSB8020" Type="Error" Arguments="$(PlatformToolset);$(PlatformToolset)" Condition="'$(DesignTimeBuild)'!='true' and '$(ToolsetTargetsFound)' != 'true' and '$(PlatformToolset)' != 'v90' and '$(PlatformToolset)' != 'v100'" /> </Target> <!-- Import After --> <Import Condition="'$(ToolsetTargetsFound)' == 'true' and Exists('$(VCTargetsPath)\Platforms\$(Platform)\ImportAfter')" Project="$(VCTargetsPath)\Platforms\$(Platform)\ImportAfter\*.targets"/> </Project> ``` Thank you for the help.