-Namespace option is not recognized in Scaffold-DbContext

Question

According to MS Docs, Scaffold-DbContext should accpect a optional parameter -Namespace. However, seems that Scaffold-DbContext cannot recognize this parameter. Did I miss something?

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Command Error:

Scaffold-DbContext "Server=.\SQLExpress;Database=Stock;Trusted_Connection=True;User Id=sa;Password=P@ssw0rd;" Microsoft.EntityFrameworkCore.SqlServer -Namespace Stock.Models.DTO

Scaffold-DbContext : A parameter cannot be found that matches parameter name 'Namespace'.
At line:1 char:151
+ ... P@ssw0rd;" Microsoft.EntityFrameworkCore.SqlServer -Namespace Stock.M ...
+                                                        ~~~~~~~~~~
    + CategoryInfo          : InvalidArgument: (:) [Scaffold-DbContext], ParameterBindingException
    + FullyQualifiedErrorId : NamedParameterNotFound,Scaffold-DbContext

Packages installed:

  <ItemGroup>
    <PackageReference Include="Microsoft.EntityFrameworkCore" Version="3.1.4" />
    <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="3.1.4">
      <PrivateAssets>all</PrivateAssets>
      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
    </PackageReference>
    <PackageReference Include="Microsoft.EntityFrameworkCore.Relational.Design" Version="1.1.6" />
    <PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="3.1.4" />
    <PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="3.1.4">
      <PrivateAssets>all</PrivateAssets>
      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
    </PackageReference>
  </ItemGroup>

Answer 1

-Namespace works EF Core 5.0 onwards. your version is lower than that. Please upgrade EF Core