How to add 64 bit target platform in Delphi XE8?

Question

The help files say right click on the target platform in the project manager and select "Add platform", but when I do this the "Add Platform" item is greyed out.

Is there another way to add the 64 bit platform?

Abnormal

Have you selected this platform in the installer's component list ? – Stanislaus

@TLama, yes 64 bit is installed and I have one application where the option to add platform worked. Tried another and it won't let me add the platform. – Abnormal

Works fine here. What's special about your scenario? – Nonie

Sounds like all possible platforms have already been added to your project. That's the only reason I see that option grayed out. Are you talking VCL or FMX? Because FMX automatically adds all platforms in a new project, whereas VCL only adds Win32. – Crescint

Are you using the Delphi starter edition? – Impassive

@Impassive He said that other projects work and they have 64bit platform available – Gastro

Yes I have professional version. – Abnormal

Answer 1

This could happen when migrating projects from previous versions of Delphi.

Try deleting the dproj file and then open the dpr file. This way usually handles the upgrade process.

If it does not, you will probably need to create a new project and add your existing source files to it.

Or you can try editing the dproj file to enable the Win64 platform.

<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
    <PropertyGroup>
        ...
        <TargetedPlatforms>3</TargetedPlatforms>
        ...
    </PropertyGroup>
    ...
    <PropertyGroup Condition="('$(Platform)'=='Win64' and '$(Base)'=='true') or '$(Base_Win64)'!=''">
        <Base_Win64>true</Base_Win64>
        <CfgParent>Base</CfgParent>
        <Base>true</Base>
    </PropertyGroup>
    ...
    <ProjectExtensions>
        <Borland.Personality>Delphi.Personality.12</Borland.Personality>
        ...
        <BorlandProject>
            ...
            <Platforms>
                <Platform value="Win32">True</Platform>
                <Platform value="Win64">True</Platform>
            </Platforms>
            ...
        </BorlandProject>
        ...
    </ProjectExtensions>
    ...
</Project>

Gastro

If you are going to edit the dproj file manually, don't forget that the Win64 platform needs to be present and enabled in the <Platforms> element: <Platform value="Win64">True</Platform> – Mok

Of course, Andy K has declared that he has 64 bit platform installed correctly. Anyway I've just edited my answer to get it more clear. Thank you – Gastro

It is not a matter of installing the Win64 platform in the IDE itself. It has to be present and enabled in the project, and the <ProopertyGroup> element you mention is not the way that happens, the <Platform> element is. The <PropertyGroup> is merely how the platform's configuration settings are managed. – Mok

I will try and delete the proj file to see what happens tomorrow when I get back to work. Both of these projects came from the same timeline XE5-XE6-XE7-XE8 and worked in XE7. Not sure why one worked on the upgrade and not the other. – Abnormal

Deleting the project file and recreating solved the problem, thanks. – Abnormal

Deleting .dproj file works in 10.1 Berlin Update 2. Thanks – Maisey