executePluginProject and targetPlatformId?

Hello (and thanks!)

I'm getting the following trying to use the "executePluginProject" tag with a targetPlatformId:

The following error occurred while executing this line:
ant4eclipse:executePluginProject doesn't support the "targetPlatformId" attribute

Has the syntax for this changed from the reference for this tag, or is it not ready yet?
I'm using a tag like the following, it seems to match the reference:

<ant4eclipse:executePluginProject workspace="${workspace.root}"
projectName="${project.name}"
targetPlatformId="${targetref-ecl}">

Thanks for any tips
Nathan