intermittent <<can't use both attribute "data" and element "data">> error

/build.xml:575: You can't use both attribute "data" and element "data".

strange, when I just call "ant", everything works fine, however when I call
<<ant cvsupdateDBloadfilesAndSchme reBuildDB cvsupdate main>>, I get the
above error plus:
You can't use both attribute "data" and element "data".
        at fmpp.tools.AntTask.initEngine(AntTask.java:246)
        at fmpp.tools.AntTask.execute(AntTask.java:523)
        at org.apache.tools.ant.Task.perform(Task.java:341)
        at org.apache.tools.ant.Target.execute(Target.java:309)
...
the build.xml looks like
          <fmpp expert="true"
                sourceroot="${basedir}/fmpp"
                outputroot="${basedir}/fmpp"
                includes="*.txf"
                logfile="${ftl_log_file}"
                skipUnchanged="none"
                replaceextension="txf,txt"
                quiet="true"
            >
            <data expandProperties="true">
                antProperties(URI4mailLinks)
            </data>
          </fmpp>


any ideas what is happening?



-------------------------------------------------------
This SF.Net email sponsored by: Free pre-built ASP.NET sites including
Data Reports, E-commerce, Portals, and Forums are available now.
Download today and enter to win an XBOX or Visual Studio .NET.
http://aspnet.click-url.com/go/psa00100003ave/direct;at.aspnet_072303_01/01