This message was deleted.

most likely classloader issues resulting in

MyExtension

class loaded multiple times

Or the existing

myExt

extension has a different type.

i ended up solving it by making the root project find the files via fileTree + filter instead of actually adding the files to the list

If one project needs outputs from other projects you should neither configure that project from the other projects to have them, nor reference the files from those other projects in the one needing them. You should use proper cross-project publication instead: https://docs.gradle.org/current/userguide/cross_project_publications.html

interesting. in my case, it is not any kind of jar or java artifact. I am just trying to aggregate some data generated by each subproject build. is there a recommended way to do this?

What kind of files it is doesn't matter. That applies to any files. That way is the recommended way. For example the

test-report-aggregation

plugin uses that technique to collect the test results from the other projects. And the

jacoco-report-aggregation

plugin uses that technique to collect the JaCoCo results and the sources from the other projects.

ok. ill take another look. thanks