Script Error in MP, "local grpName..doesn't exist"

[Wrecking Crew]

DCS v1.5.3, Mist v4.1.61, Vulcans vs Sharks mission, Multiplayer *Client* Mission script error:

[string "local grpNameHelicopter = 'UH-1H 06 FARP London Cold Start'..."]:3: Group doesn't exist

This error shows up in a dialog box on the server.

 

Is there a problem with a script getting the Group Name of a Client in Multiplayer? What's the '3' in the error string for? LN?

 

This mission/code works in Singleplayer for both Clients and AI helicopters, and a slightly modified code version works for AI helicopters in both Singleplayer and Multiplayer in the same mission. The error shows up with a Client in Multiplayer.

 

Client code:

local grpNameHelicopter = 'UH-1H 06 FARP London Cold Start'
local grpNameTeam = 'BLF VGrp90 Stinger'
local unitNameHelicopter = Group.getByName(grpNameHelicopter):getUnit(1):getName()
local basePos = mist.getLeadPos(grpNameHelicopter)
local baseHeadingRad = mist.getHeading(Unit.getByName(unitNameHelicopter))
local baseHeadingDeg = baseHeadingRad * 180 / math.pi
local newGroupTeam = mist.getGroupData(grpNameTeam)
local newCoords = 
   {
       [1] = 
       {
           x = basePos.x + ((75 * math.cos(baseHeadingDeg)) - (0 * math.sin(baseHeadingDeg))),
           y = basePos.z + ((75 * math.sin(baseHeadingDeg)) + (0 * math.cos(baseHeadingDeg))),
           heading = baseHeadingDeg,
       },
       [2] =
       {
           x = basePos.x + ((-75 * math.cos(baseHeadingDeg)) - (75 * math.sin(baseHeadingDeg))),
           y = basePos.z + ((-75 * math.sin(baseHeadingDeg)) + (75 * math.cos(baseHeadingDeg))),
           heading = baseHeadingDeg + 40,
       },
       [3] =
       {
           x = basePos.x + ((-75 * math.cos(baseHeadingDeg)) - (-75 * math.sin(baseHeadingDeg))),
           y = basePos.z + ((-75 * math.sin(baseHeadingDeg)) + (-75 * math.cos(baseHeadingDeg))),
           heading = baseHeadingDeg - 40,
       }
   }
for i = 1, #newGroupTeam.units do
   newGroupTeam.units[i].x = newCoords[i].x
   newGroupTeam.units[i].y = newCoords[i].y
   newGroupTeam.units[i].heading = newCoords[i].heading
end
newGroupTeam.clone = true
mist.dynAdd(newGroupTeam)
local unitNameHelicopterPlayer = Group.getByName(grpNameHelicopter):getUnit(1):getPlayerName()
trigger.action.outText(unitNameHelicopterPlayer .. ' just dropped off a Stinger team!', 20)

 

AI Helicopter code:

local grpName = 'BLF HGrp11 UH-1H Stinger'
local unitNameManpads = 'BLF VGrp90 Stinger'
local unitName = Group.getByName(grpName):getUnit(1):getName()
local basePos = mist.getLeadPos(grpName)
local baseHeadingRad = mist.getHeading(Unit.getByName(unitName))
local baseHeadingDeg = baseHeadingRad * 180 / math.pi
-- trigger.action.outText('x = ' .. basePos.x .. ', z = ' .. basePos.z .. ', unit = ' .. unitName .. ', heading Radians = ' .. baseHeadingRad .. ', heading Degrees = ' .. baseHeadingDeg, 6)
local newGroup = mist.getGroupData(unitNameManpads)
local newCoords = 
   {
       [1] = 
       {
           x = basePos.x + ((75 * math.cos(baseHeadingDeg)) - (0 * math.sin(baseHeadingDeg))),
           y = basePos.z + ((75 * math.sin(baseHeadingDeg)) + (0 * math.cos(baseHeadingDeg))),
           heading = baseHeadingDeg,
       },
       [2] =
       {
           x = basePos.x + ((-75 * math.cos(baseHeadingDeg)) - (75 * math.sin(baseHeadingDeg))),
           y = basePos.z + ((-75 * math.sin(baseHeadingDeg)) + (75 * math.cos(baseHeadingDeg))),
           heading = baseHeadingDeg + 40,
       },
       [3] =
       {
           x = basePos.x + ((-75 * math.cos(baseHeadingDeg)) - (-75 * math.sin(baseHeadingDeg))),
           y = basePos.z + ((-75 * math.sin(baseHeadingDeg)) + (-75 * math.cos(baseHeadingDeg))),
           heading = baseHeadingDeg - 40,
       }
   }
for i = 1, #newGroup.units do
   newGroup.units[i].x = newCoords[i].x
   newGroup.units[i].y = newCoords[i].y
   newGroup.units[i].heading = newCoords[i].heading
end
newGroup.clone = true
-- trigger.action.outText('x = ' .. basePos.x .. ', z = ' .. basePos.z .. ', group = ' .. grpName .. ', unit = ' .. unitName .. ', heading Radians = ' .. baseHeadingRad .. ', heading Degrees = ' .. baseHeadingDeg .. ', Manpads = ' .. unitNameManpads, 6)
mist.dynAdd(newGroup)

 

WC

Edited April 18, 2016 by Wrecking Crew

[nomdeplume]

Is "UH-1H 06 FARP London Cold Start" always occupied by a player when this script runs? If not, then the group would be empty and thus probably not returned by Group.getByName(), or if it is returned then getUnit() wouldn't return any units.

 

From the error message it looks like the group doesn't exist at all, as far as the game is concerned.

 

I do seem to recall some problem with getting multiplayer group names recently. Not sure if it's exactly this, or if it was ever fixed.

[Steggles]

As far as I know it's not fixed yet. I'll link the post in an edit. There is a scripting bug where client group data is not accessable in multiplayer.

 

Source: http://forums.eagle.ru/showpost.php?p=2494017&postcount=1

 

Workaround: http://forums.eagle.ru/showpost.php?p=2499638&postcount=5 Seeing that you are already using mist, modify ciribob's script to pull the information you need.

 

And the 3 in the error is the line number that the error occurred.

Edited April 19, 2016 by Steggles

[Wrecking Crew]

I knew I'd seen that before - Thanks, Steggles for pointing me to it.

 

WC

[FlightControl]

It try to use moose

[Wrecking Crew]

I'll wait for the engine to be fixed, the Vulcans & Sharks mission will go on the inactive list.

 

WC