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IDProjectCategoryView StatusDate SubmittedLast Update
0008059opensim[GRID] Hypergridpublic2016-11-16 16:222018-09-24 07:32
Assigned To 
PlatformOSOS Version
Product Version0.9.0 
Target VersionFixed in Version 
Summary0008059: Unknown UserUMMAU42 replaces real User Name in Viewer Chat Window
DescriptionWhen you visit opensim grids, one or more user names are replaced with the words Unknown UserUMMAU42 your chat window. This makes group communication impossible.

This is a huge issue for hypergrid travelers. The weekly Hypergrid Safari provides an opportunity to investigate (and hopefully fix) this ongoing problem.

Steps To ReproduceVisit other grids. It will happen.
Additional InformationBelow is a small sampling from Hypergrid Safari on Nov 16 2016. These 5 people all saw Unknown UserUMMAU42 instead of user names in their chat window. We were visiting a region running .83

Viewer, Home Grid version
Singularity, .91
Singularity, .91
Firestorm, .83
Firestorm, .83
Firestorm, .9

TagsNo tags attached.
Git Revision or version number
Run ModeStandalone (1 Region)
Physics EngineBulletSim
Script Engine
Mono VersionNone
Attached Files

- Relationships

-  Notes
UbitUmarov (administrator)
2016-11-16 16:29

yes UMMAU42 and now also UMMAU43 are a old HG problem, a full fix may not be possible without changes to HG2.0
but it is possible 0.9 made it a bit worse with changes to improve in Grid tps, we will look into that.
Mandarinka Tasty (reporter)
2016-11-16 16:36


I have noticed it, many times too. And also, not just during HG travels,

but also when I tp from region A to region B, within the same grid,

then randomly NPC bots also recognized by my viewer as Unknown UserUMMAU42

But not always, so it is hard to predict, when precisely it occurs.

Anyway, I have developed my personal workaround:

when I can see Unknown UserUMMAU42, then I open Firestorm preferences: CTRL+P

and in General tab, I do following operation:

I uncheck option: Trim "Resident" from legacy names

and after second I check it again.

And then, all Unknown UserUMMAU42 are replaced by correct usernames.

It works for me always, but I am not able to claim that it can help others.
smxy (reporter)
2016-11-16 16:55

I have also seen this when I've HG TP'd to other grids.
Fly-Man- (developer)
2018-08-27 04:21

This is still an issue at this moment, people will show up as UserUMMAU42 or UserUMMAU43 when on another grid.
UbitUmarov (administrator)
2018-09-24 07:32

Most of this is a viewer side issue.
During teleports viewers keep asking the avatar names, for some time, to the start region, including avatars that are on the destination.
This will fail on HG or with NPCs, since the avatars are unknown to the start region.

I removed the UserUMMAU42 sometime ago.
Viewers will display the UUID on unknown avatars and a few minutes later they will retry, this time to the correct region.

- Issue History
Date Modified Username Field Change
2016-11-16 16:22 SJ New Issue
2016-11-16 16:29 UbitUmarov Note Added: 0031287
2016-11-16 16:36 Mandarinka Tasty Note Added: 0031288
2016-11-16 16:55 smxy Note Added: 0031289
2018-08-27 04:21 Fly-Man- Note Added: 0032890
2018-08-27 04:21 Fly-Man- Status new => confirmed
2018-09-24 07:32 UbitUmarov Note Added: 0033056

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