RL fixed it in IC8.01
https://www.reallusion.com/FeedBackTracker/Issue/IC8-crashing-consistently-at-the-last-frame-of-video-rendering

______________________________________________________________________________
Software developer. iClone hobbyist since January 11, 2020. Best work so far: Robots among us: The Lab and The sad end of a legend
In progress: Black Mamba
AMD Ryzen 3950X 16C/32T 4.2 GHz, 64GB RAM, RTX2080 11GB, 2TB Samsung 970 Pro SSD, 8TB Seagate BarraCuda HDD, Win11 64-bit, iClone 8.12

I tested with your project also in iClone 8 trial and had the same issues, after turning off soft cloth physics I was able to render completely.
So I hope this helps the more people we get to test it, the better.


Warped Reality VFX.

Yeah, me too I said I'm not assuming it's Chic bun's fault since I have the same character (with the same chic bum) in other projects doing pretty well. Moreover, my very first project I opened in IC8 (and immediately crashed this way, lol) was IC7 Black Mamba, and there the girl has a totally different hair.
I will submit to feedback tracker, let's hope they will fix the issue.
Thanks, Mr G 🤗

EDIT: here's the FeedbackTracker report:
https://www.reallusion.com/FeedBackTracker/Issue/IC8-crashing-consistently-at-the-last-frame-of-video-rendering

______________________________________________________________________________
Software developer. iClone hobbyist since January 11, 2020. Best work so far: Robots among us: The Lab and The sad end of a legend
In progress: Black Mamba
AMD Ryzen 3950X 16C/32T 4.2 GHz, 64GB RAM, RTX2080 11GB, 2TB Samsung 970 Pro SSD, 8TB Seagate BarraCuda HDD, Win11 64-bit, iClone 8.12

It's a bit more than Chic bun medium hair problem.
Yes, that hair physics for one reason or another is troubling, but it is a consequence of internal error from more deeper issue.

If you disable physics for Real_Hair, the project renders fine. So it is a physics issue.
But I believe at this point the real problem is animation layer. It causes a permanent hair damage within the project.
And it appears Real_Hair is just most vulnerable to such a damage.

Replacing hair with the same Chic bun medium does not fix the issue.
Removing animation does not fix the issue.


But this does:
Save that motion with collect clip as Motion+
Delete the clip along with Transform key so that she is standing in T-pose at 0,0,0
Apply saved Motion+ clip
Reapply "Chic bun medium" from Shared Template\Hair\Style
Render. All should render fine.

So at which point the hair physics is getting messed up is for the RL to figure.

Another reason I am saying it is not the hair problem (at least not directly), because my project is old and there is no modern hair on any of the characters there and not even any DHS.
Yet it crashes just the same. I need to investigate the issue there.

OK, I minimized the project as much as possible and I replaced the character with IC8 "native" Camilla to which I applied in CC4 the (assumed) "troubling" hair "Chic bun medium".
I downloaded the zip (78MB) myself to be sure the project still crash (and it's crashing) so please have a check yourself to see if it's crashing on your IC8 too, so we can send it "safely" to Feedback Tracker.
Thanks!
https://www.dropbox.com/s/yg70875ectnj9ur/crash_on_video_render_last_frame.zip?dl=0

______________________________________________________________________________
Software developer. iClone hobbyist since January 11, 2020. Best work so far: Robots among us: The Lab and The sad end of a legend
In progress: Black Mamba
AMD Ryzen 3950X 16C/32T 4.2 GHz, 64GB RAM, RTX2080 11GB, 2TB Samsung 970 Pro SSD, 8TB Seagate BarraCuda HDD, Win11 64-bit, iClone 8.12

Also, crash doesn't seem to be related with a particular last frame - no matter how long I set the timeline, IC crash at the last frame

I have seen this today already: https://forum.reallusion.com/FindPost515760.aspx
Seems consistent now...


Update: OUCH! Tried rendering 29 frames of large project I rendered successfully in IC7 in the past. Crashed at frame 27!




If you have already stripped your project, please open an FT ticket and attach it there. I am too lazy to strip mine :w00t:

@Peter, you may reopen this topic :D

It seems I've been superficial in checking - the crash indeed occurs consistently and for sure is related to avatar's hair. I've tried to replace the avatar with others to which I attached in CC4 the same hair, yes, it's crashing. If I'm replacing the hair with another one, there's no crash. Crash doesn't seem to be related with the MP4 encoder - app crash no matter if I use hardware/software encoder.
Also, crash doesn't seem to be related with a particular last frame - no matter how long I set the timeline, IC crash at the last frame.
It might be related with a particular rendering - light or physics - condition in the project, since the same avatar used in other projects doesn't make IC to crash.

I will try to simplify as much as possible the project to make a small one to be tested here by who's willing to.
P.S the hair is native RL "Chic bun medium" - both the one in Hair/HairStyle and the one in Hair/HairGroup/Hair, but I don't think it's necessarily its fault, rathen than IC's.

______________________________________________________________________________
Software developer. iClone hobbyist since January 11, 2020. Best work so far: Robots among us: The Lab and The sad end of a legend
In progress: Black Mamba
AMD Ryzen 3950X 16C/32T 4.2 GHz, 64GB RAM, RTX2080 11GB, 2TB Samsung 970 Pro SSD, 8TB Seagate BarraCuda HDD, Win11 64-bit, iClone 8.12

@Peter You may close/remove this topic, the crash no longer occurs - don't know why, maybe because I just restarted the computer meantime.

______________________________________________________________________________
Software developer. iClone hobbyist since January 11, 2020. Best work so far: Robots among us: The Lab and The sad end of a legend
In progress: Black Mamba
AMD Ryzen 3950X 16C/32T 4.2 GHz, 64GB RAM, RTX2080 11GB, 2TB Samsung 970 Pro SSD, 8TB Seagate BarraCuda HDD, Win11 64-bit, iClone 8.12

No worries just try a default character a new one from ic 8 maybe 🙂

I didn't install yet the CC4 - even with IC8 I won't count on it too much, I'm expecting RL will came with a patch in a month, me I'm happy it didn't affect the IC7 so I can continue there on my clip :P

______________________________________________________________________________
Software developer. iClone hobbyist since January 11, 2020. Best work so far: Robots among us: The Lab and The sad end of a legend
In progress: Black Mamba
AMD Ryzen 3950X 16C/32T 4.2 GHz, 64GB RAM, RTX2080 11GB, 2TB Samsung 970 Pro SSD, 8TB Seagate BarraCuda HDD, Win11 64-bit, iClone 8.12