CS1607: Assembly generation -- The version '1.4.0.85725' specified for the 'file version' is not in the normal 'major.minor.build.revision' format

(Please excuse me if I get any terms mixed up here - I am a Java developer, new to .Net and C#. Please add/correct any tags on this question if need be.)

I am using an MSBuild script to build my project. One of the tasks is to write the assembly info:

<Target Name="UpdateAssemblyInfo">
    <Message Text="Updating assemblies to file version $(AssemblyVersion) ($(AssemblyFileVersion))" Importance="high"/>
    <AssemblyInfo CodeLanguage="CS"
                  OutputFile="SharedAssemblyInfo.cs" 
                  AssemblyVersion="$(AssemblyVersion)"
                  AssemblyFileVersion="$(AssemblyFileVersion)"
                  AssemblyProduct="SVN revision $(BUILD_NUMBER)"/>
</Target>

This converts SharedAssemblyInfo.cs from this:

[assembly: System.Reflection.AssemblyVersion("0.0.0")]

To this:

//------------------------------------------------------------------------------
// <auto-generated>
//     This code was generated by a tool.
//     Runtime Version:4.0.30319.18063
//
//     Changes to this file may cause incorrect behavior and will be lost if
//     the code is regenerated.
// </auto-generated>
//------------------------------------------------------------------------------

[assembly: System.Reflection.AssemblyVersion("1.4.0")]
[assembly: System.Reflection.AssemblyFileVersion("1.4.0.85725")]
[assembly: System.Reflection.AssemblyProduct("SVN revision 85725")]

So far so good. Except I see the following message in the build log of TeamCity:

CSC warning CS1607: Assembly generation -- The version '1.4.0.85725' specified for the 'file version' is not in the normal 'major.minor.build.revision' format

Why am I getting this warning, when the format of the version appears to follow the format specified in the warning message?

Solution

The reason why you are getting the error is because the revision number is greater than 65534.