Hi Martin,

Unfortunately, singleton init is still not fixed in MPICH. There is a PR fixing it for `hydra2` -- https://github.com/pmodels/mpich/pull/3340. The fix for hydra would be similar.

-- 
Hui Zhou

From: Martín Morales via discuss <discuss@mpich.org>
Reply-To: "discuss@mpich.org" <discuss@mpich.org>
Date: Wednesday, April 29, 2020 at 4:22 PM
To: "discuss@mpich.org" <discuss@mpich.org>
Cc: Martín Morales <martineduardomorales@gmail.com>
Subject: [mpich-discuss] Singleton spawns

Hello All. I really need to run mi application like a singleton (i.e. without mpirun) and dynamically spawns tasks from there. I recently builded the last release (mpich 3.3.2), but I can't do this. So, the singleton spawns It's not supported or I'm doing something wrong?

Thanks.

Martín