# 17.1. PRRTE v4.x series

This file contains all the NEWS updates for the PRRTE v4.x series, in reverse chronological order.

## 17.1.1. 4.0.0 – TBD

Important

This is the first release in the v4 family. The intent for this series is to provide regular “reference tags”, effectively serving as milestones for any development that might occur after the project achieved a stable landing zone at the conclusion of the v3 series. It is expected, therefore, that releases shall be infrequent and rare occurrences, primarily driven by the completion of some significant feature or some particularly critical bug fix.

For this initial release, that feature is completion of support for the Group family of PMIx APIs. This includes support for all three of the group construction modes, including the new “bootstrap” method.

A few notes:

(1) Starting with this release, PRRTE requires Python >= v3.7 to build a Git clone (ie., not a tarball). Certain elements of the code base are constructed at build time, with the construction performed by Python script. The constructed elements are included in release tarballs.

(2) PRRTE >= v4.0 is not compatible with PMIx < v6.0 due to internal changes (e.g., show-help messages are now contained in memory instead of on-disk files). Configure will therefore error out if the detected PMIx version does not meet this criterion.

A full list of individual changes will not be provided here, but will commence with the v4.0.1 release.