Maven antrun with sequential ant-contrib fails to run

Question

We have a special routine to explode files in a subfolder into extensions, which will be copied and jared into single extension files. For this special approach I wanted to

Answer 1

Therefore I wasted at least one hour to find the error a little hint below ...

I use maven3 and the rest as described above, BUT I have to use maven.dependency.classpath instead of maven.plugin.classpath! Otherwise maven won't find the contrib tasks. Hope this helps anybody.