Thank you Martin that was my problem ! Switching OFF useIncrementalCompilation did the trick, it's really counter-intuitive...
Le lundi 22 mai 2023 à 23:17:38 UTC+2, Martin Desruisseaux <martin.desruisse...@geomatys.com> a écrit : Hello Jerome Le 22/05/2023 à 22:53, Jerome Lelasseux a écrit : On my NB platform app, if I open a single module and build it, it recompiles only when source files are modified, as expected. But when I run Build on the parent project, maven always recompiles all modules. Is it normal ? I do not know if this is related to the issue that you are observing, but the maven-compiler-plugin has a weird behavior where we actually need to disable incremental build in order to get incremental build. The issue is described here: https://issues.apache.org/jira/browse/MCOMPILER-209 Martin