A WixExtension used in the way you describe usually supplies three things: a
CompilerExtension (to parse your new elements and attributes), a Table
definition (comes from a tables.xml-style file with the definitions of the
tables unique to your extension), and a binary-wixlib (containing your CAs and
related authoring).
Usually your CompilerExtension will supply two things: references to items in
your wixlib, and rows into your tables (from the authoring you parse). Those
rows are not part of your wixlib.
CreateWixSimpleReferenceRow creates a reference to a row that needs to be
supplied from elsewhere, usually the wixlib supplied by the extension.
If the WixExtension supplies the wixlib, you don't need to supply it. Also, if
the WixExtension supplies the table definitions (via the tables.xml-style
file), you don't need to duplicate the table definitions in your wixlib (using
CustomTable elements).
Also, make sure that your extension is supplied to both candle and light in
your build script.
I would guess that you are missing the tables.xml-style reference in your
WixExtension (which I suspect is the source of your "missing" error), and that
you are supplying the wixlib used in your extension directly to your setup
project (which I suspect is the source of your duplicate symbol).
> From: john.ludlow...@gmail.com
> Date: Wed, 10 Jul 2013 12:25:38 +0100
> To: wix-users@lists.sourceforge.net
> Subject: [WiX-users] Duplicate symbol when using
> CompilerCore.CreateWixSimpleReferenceRow
>
> Hi,
>
> My installer has two projects - a Setup Project which emits an .MSI and
> contains install metadata, and a Setup Library Project which emits a
> .wixlib which contains install components. The latter makes use of a
> compiler extension which generates an MSI table based on some child
> elements of the File element. In other words, it looks like this:
>
> <File>
> <myext:MyFunkyExtension/>
> </File>
>
> (attributes omitted for brevity)
>
> The extension consists of three projects: a C# class library for the actual
> extension, a C++ Custom Action Library for the custom actions that will use
> the data in the table, and a wixlib to hold the custom action definition.
> The CA DLL is bound into the wixlib, and the wixlib is included in the
> extension dll project as an embedded resource.
>
> Now here comes the issue...
>
> When I reference the extension DLL from just the wixlib which has the
> components in, I get this error:
>
> Error 1 Cannot find the table definitions for the 'MyTable' table. This is
> likely due to a typing error or missing extension. Please ensure all the
> necessary extensions are supplied on the command line with the -ext
> parameter. light.exe 0 1 MyInstall
>
> I wondered if the setup project needed the reference as well, but when I
> add that I get this:
> Error 1 Duplicate symbol 'CustomAction:MyCA' found. This typically means
> that an Id is duplicated. Check to make sure all your identifiers of a
> given type (File, Component, Feature) are unique.
> MyComponentSetupLibrary.wixlib 0 1 MyInstall
>
> I reckon this is down to this code at the end of the ParseElement methjod
> in the extension:
>
> Core.CreateWixSimpleReferenceRow(ln, "CustomAction", "MyCA");
> I did this on the suggestion of the Wix 3.6 Development Guide (Chapter 14)
> in order to create a reference to the action in order to pull the fragment
> into the installation.
>
> I also noticed that my ParseElement method seems to get called twice. Is
> this because I have 2 references from my projects (one from my setup
> project and one from my setup library project)? This is odd - I thought you
> could reference things as many times as you liked in this manner, and if it
> was already there then it would just ignore it.
>
> Any hints would be greatly appreciated.
>
> Thanks
>
> John
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