First the structure: My parent POM has no references to child modules etc. There is a separate reactor-POM that contains the <modules>...</modules> section - and the reactor POM is also a child of the parent POM (the modules listed in the reactor POM inherit from the parent POM).
Last but not least its a Eclipse/Tycho build.
Now, i want to update the version of the whole project. Starting with the parent POM there is the first problem: How can i force the child modules of the parent to update the parent version, if the child modules are declared in a different POM (the reactor)?