Mission Planner Copter Swarm not working

[Georacer]

Bug Report

Bug report

Launching a simulation in Mission Planner, using the "Latest (Dev)" option and "Copter Swarm - Single Link" button does not work.

Issue details

MP brings you back to the Data screen, saying that it could not connect to the SITL instance.
Stable 4.6 works.

The "Copter Swarm - Multilink" option doesn't error out, but doesn't show telemetry either. However, I might be using it wrong.

Version
4.8 Dev

Platform
[ ] All
[ ] AntennaTracker
[X] Copter
[ ] Plane
[ ] Rover
[ ] Submarine

Airframe type
N/A

Hardware type
N/A

Logs
I'm not aware of any way to pull a Mission Planner log, if such a thing exists.

[Georacer]

@rmackay9 you might want to consider this for fixing before 4.7 releases.

[rmackay9]

Hi @Georacer,

Txs for the report, I've added this to the 4.7 issues list

[rmackay9]

I've reproduced this issue as well. The change is likely in the ardupilot firmware because selecting "Stable" or "Beta" from the AP version does work. So it's only "Latest (Dev)" that doesn't work.

This is what I see in the MP console