Thanks for the comment,
Unfortunately it does not work for ProcessContainer (this might be possible but requires quite some work, not sure I will have the time to do it). Also it does not work with scripts (this is currently a limitation of PI) or with process that only generate files (as CosmeticCorrection). For this type of process I would need to find the outputDirectory and possibly prefix/postfix to adapt them between each run, unfortunately the names of theses properties is not standarized (I could probably find them in the most common cases - when I have the time).
-- bitli