reported SLAM-ER not hitting their target server side

[504Goon]

With SLAM-ER flight profile selected as LOW, the missile will cruise at about 5000ft if launched above 5000ft. If launched below 5000ft, the missile will fly at approximately 100ft. Tested with F/A-18C

[504Goon]

Server side the SLAM-ER's never hit their targets. Instead they just fly straight and level from their launching position/altitude until they run out of fuel. I've attacehd server and client side tracks and tacviews to showcase the issue. I've only done this test with SLAM-ER's, with the F/A-18C, so i don't know if this issue happens with other weapons or aircraft.

Also worth noticing, i set 1 SLAMMER flight level to HIGH, 2 MEDIUM and 1 LOW, and from the client side replays you can see 2 SLAMM-ER's skimming the sea, so something funky going on there as well.

SLAMMERTEST-CLIENT.trk SLAMMERTEST-CLIENT.acmi SLAMMERTEST-SERVER.acmi SLAMMERTEST-SERVER.trk

[504Goon]

Any chance to look at this? This bug basically renders the SLAM-ER unusable weapon in multiplayer setting. I verified and the bug does still exists with the latest build. 

[lester]

I second that. SLAM-ER just go straight when intermediate steerpoints (as waypoints) are present (also was on MP server). As if they are unable to turn.
It's unfortunate that such a powerful weapon in the Hornet inventory is broken for such a long time.

[504Goon]

I noticed this requires track replay, this thread has them:
 

 

[BIGNEWY]

threads merged we will take a look thanks 

[BIGNEWY]

We do already have a report to check the SLAM-ER as soon as we have a tweak or fix we will post in the change logs

thank you 

[Jel]

Me: Host

Friend: Client

Both of us flying the F18 in close formation, both of us carrying Harpoon and SLAM/ERs.

Friend launches 2 SLAM/ER to a given target, we both see them releasing properly from the pylons.

Then, few seconds later, i see both SLAM/ER continue flying our heading, Friend tells me "i see both of them turning to designated target heading".

From my perspective, the SLAM/ERs are flying 060° / 25.000ft straight (also on the F10 map and F6 view), from his perspective both SLAM/ER are flying 095° / 25.000 ft (also seen in F6 view and F10 map).

I also saw both later splashing into the ocean while he still saw both on course and even got a live feed from his DL pod during Terminal.

 

What the F ? Any idea why two ppl on the same server see the same weapon do 2 different things ?

No, there weren´t any other SLAM/ERs in the air, it´s just the 2 of us online.

 

Edit:

Watching my own track (server host), all happens as describend from my own perspective.

Edited January 26 by Jel

[Jel]

Here´s the track from the host: 

https://www.dropbox.com/scl/fi/2hcpzafbgg3ulr76fqezu/server-20250125-150809.trk?rlkey=7qdvpmaer7lzcv175lxq5910c&dl=0

 

This one´s the track from the client:

https://www.dropbox.com/scl/fi/i7os6i99ard3dmfdmcklb/Free_Flight_Marianna_AFB_-20250125-150740.trk?rlkey=vw1oe3b8jt2glcfitc3tmodfi&dl=0

note: The client´s track doesn´t seem to load for us.

[Lord Vader]

Hello @Jel

We are reviewing several items involving the AGM-84. 

Please stay tuned for future DCS updates.  

[BarTzi]

On 1/25/2025 at 5:34 PM, Jel said:

Me: Host

Friend: Client

Both of us flying the F18 in close formation, both of us carrying Harpoon and SLAM/ERs.

Friend launches 2 SLAM/ER to a given target, we both see them releasing properly from the pylons.

Then, few seconds later, i see both SLAM/ER continue flying our heading, Friend tells me "i see both of them turning to designated target heading".

From my perspective, the SLAM/ERs are flying 060° / 25.000ft straight (also on the F10 map and F6 view), from his perspective both SLAM/ER are flying 095° / 25.000 ft (also seen in F6 view and F10 map).

I also saw both later splashing into the ocean while he still saw both on course and even got a live feed from his DL pod during Terminal.

 

What the F ? Any idea why two ppl on the same server see the same weapon do 2 different things ?

No, there weren´t any other SLAM/ERs in the air, it´s just the 2 of us online.

 

Edit:

Watching my own track (server host), all happens as describend from my own perspective.

This was reported a long time ago, and wasn't fixed. The hit is what matters. Everything else is not synchronized between clients, and this is true for most standoff weapons (Harpoon included)

[Jel]

vor 1 Stunde schrieb BarTzi:

This was reported a long time ago, and wasn't fixed. The hit is what matters. Everything else is not synchronized between clients, and this is true for most standoff weapons (Harpoon included)

We´ve been flying for years and never had this desync thingy appear, all standoff systems went super smooth - which is why i initally posted this. Good to know this issue got placed long ago, so i guess there will be some fixes "soon"

[bogusheadbox]

Just to bring attention back to this one. 

 

Both Slam and ER variant online shows massive desync issues.  Over a couple of flights, I launched 5 slams of both types.  A friend watched the target.  All slams were guided to correct target with data link pod, so I didn't miss.  

Out of 5 missiles my friend only saw one hit.   This hit was seen about 10 seconds after data link was lost my side from me seeing impact. 

 

So results were, 

3 non seen hits, 

1 seen hit with about 10 second delay in impact between clients. 

1 missile that decided to spin out of control and fly away from target. 

 

Unfortunately this weapon is not usable online. 

[BarTzi]

On 4/28/2025 at 5:53 PM, bogusheadbox said:

Just to bring attention back to this one. 

 

Both Slam and ER variant online shows massive desync issues.  Over a couple of flights, I launched 5 slams of both types.  A friend watched the target.  All slams were guided to correct target with data link pod, so I didn't miss.  

Out of 5 missiles my friend only saw one hit.   This hit was seen about 10 seconds after data link was lost my side from me seeing impact. 

 

So results were, 

3 non seen hits, 

1 seen hit with about 10 second delay in impact between clients. 

1 missile that decided to spin out of control and fly away from target. 

 

Unfortunately this weapon is not usable online. 

I don't disagree with you- but as I said before: if you see a hit via the DL pod, then the target exploded. What your friend should be watching is not the missile, but the target. What he should see is the target "randomly" exploding as you report a hit. The missile path is not synched at all, but the damage is.

[bogusheadbox]

In testing, we found that the damage is not even in sync.   They are just outright borked in multiplayer.

[BIGNEWY]

Hi all, 

can you give me a simple example from the server / client showing the issue. 

If possible just use the units needed for the test and Caucasus, it makes it easier to debug. 

thank you 

[Anubis_94]

On 5/22/2025 at 4:17 PM, BIGNEWY said:

Hi all, 

can you give me a simple example from the server / client showing the issue. 

If possible just use the units needed for the test and Caucasus, it makes it easier to debug. 

thank you 

 

As requested: tracks and ACMIs from host and client pov.

Also a video from host pov (weapon release at ~2.40): 

 

Two F18, one SLAMER each, release at the same time. Each player see its own SLAMER hit the ground, and the SLAMER of the other player fly straight ahead.

testSLAMERDesync_CLIENT.acmi testSLAMERDesync_CLIENT.trk testSLAMERDesync_HOST.acmi testSLAMERDesync_HOST.trk

Edited 13 hours ago by Anubis_94

[BIGNEWY]

thanks we will ask QA to take a look 

 

[BIGNEWY]

threads merged. 

It is reported and being looked into internally. 

thank you