How the Race Was Lost: ZNF in ZRL Race 2 (Makuri 40)

The second race of Zwift Racing League 2023/24 Round 1 happened Tuesday, September 19. It was the first points race of the season, and also the longest, taking place on Makuri 40 with 5 sprint intermediates.

My DIRT Kraken team was well-positioned for a good result on this route, and I took care in the days leading up to the race to make sure my legs were ready for a max effort. Because every point counts!

The Warmup

The race began at 9:30am, so I ate breakfast well beforehand. As we got closer to launch I chewed some caffeine gum (300mg of go-go juice!) and applied PR lotion to the legs before kitting up and heading to the warmup.

Like last week, I ended up with a messy warmup because I had many things to set up: Zwift/Trainer/Discord/Video/Sauce for Zwift… it was all a bit of a mess. I got it all taken care of, though. Or at least, I thought I did.

With 40 seconds to go I realized I was still in my virtual Zwift Insider kit, in the pens! ZRL is a team race, and it’s important that each team’s members wear the same kit so you can see who you’re competing against.

I swapped kits at the last moment, but into the pink DIRT kit instead of the orange, because I couldn’t find the orange one in my list of jerseys. Thanks to the way Zwift caches other riders’ kits, everyone would probably be seeing me in my ZI kit for the race. But I couldn’t help that now. The race was on!

The Start

We knew the start of this race was going to be tough: a 1.5km climb right out of the gate, punctuated by the first sprint segment of the season. 394W (4.75W/kg) for 3 minutes was almost a 6-week power PB for me, but it was enough to keep me nicely positioned in the front pack.

I didn’t contest the Village Sprint, but sat in the wheels and spun my legs out to prepare for the next sprint.

Country Sprint Smash

The Country Sprint is a fast sprint in this direction because you enter it after descending from Village Onsen. This was a sprint I planned to target if the legs felt good, because the downhill lead-in would work to my advantage as a slightly heavier rider in this group (83kg).

My legs felt good, I had my aero powerup in hand, and quick access to trigger it via Zwift Play. Now it was just a matter of timing. As we neared the start line, I positioned myself near the back of the pack so I could sprint through it, then revved up the power to start moving through the pack, which was already traveling at 60+kph.

Approaching the front of the group, I triggered my aero and went all-in with power, flying off the front of the pack just as we passed the start line. A bit early, perhaps, but I was committed now!

A few seconds later I glanced up at the screen and saw my rider was in the wind, leading out the sprint in 1st place! That motivated me to keep pushing, and I gave it all I had to the line, crossing first about 25 seconds after starting my initial effort.

The sprint leaderboard popped up – teammate Dave Husbo had grabbed 1st for FTS, and I was 3rd FTS and 1st across the line (FAL). Hurray!

Disastrous Zwexit

Buoyed by my sprint win, I returned to sitting in the wheels, knowing the next two sprints were both great chances to grab additional points for my team. (Both the Alley Sprint Reverse and Country Sprint Reverse are slightly downhill.)

Then, disaster struck.

As my distance counter ticked over 12.7km in Neokyo, my Zwift visuals suddenly locked up… then disappeared. Zwift had crashed on PC. My race was over.

Here’s when it happened:

Reverting to DS Duties

There was nothing I could do to get back into the race – unlike outdoor racing there are no team cars or free laps in Zwift.

My race was done, but I could still sign on and watch the race, acting as DS on Discord to help my teammates ride smart and maximize our result. So I started up Zwift again, clicked to join a RoboPacer in Makuri Islands, then looked up my teammate Diogo in the Companion app so I could click to fan view him.

From Zwift crash to fan-viewing took just over 2 minutes. Inside I was still seething over the crash… I’d finally earned some intermediate points, and now they were gone! But I knew it wouldn’t do any good to voice my frustrations on Discord mid-race, and I knew I could help just a little by playing DS. So I opened browser windows and starting directing as best I could while turning over the pedals.

Sprints 3-4

We had 4 riders left in the front group, with our 5th (Wojtek) in a chase pack.

On the Alley Sprint, Grant grabbed 3rd and Husbo 6th for FAL, and I let everyone know that a fair number of riders got gapped off the back. “400 meters to the start of the Castle Sprint!” I called out.

Kraken did well on this fourth sprint, with Daz grabbing 2nd, Husbo 4th, and Grant 10th FAL. Daz also grabbed 4th, Husbo 5th, and Diogo 10th in FTS. A nice points haul. Then it was time to recover as the group made its way out of Neokyo and down the Pain Cavern descent to Urukazi.

Sprint 5 and Finish

The final sprint came after a longish climb where even more riders got dropped – but the Kraken held on! Husbo grabbed 7th FAL and 6th FTS. He was really cleaning up on the sprint points.

As the race progressed I was looking at ZwiftPower Live to see how many riders each team had left in the front pack, as this is often a good measure of overall team performance in ZRL. Kraken still had 4, and so did SZ (a strong team and last week’s winner) and team CONED. Most teams only had 3.

Our four in front held on up the long climb through the slot canyon, then gave it all they had to the finish line. Husbo was our best finisher in 6th, with Daz in 9th, Grant 15th, Diogo 28, and Wojtek 65th.

A strong performance, but where would we place overall, with my points removed from the total?

See results on ZwiftPower >
See activity on Strava >

Watch the Video

Watch the first 12.7km of my race… then watch me play DS:

Team Result

We finished 3rd in points for this race, but I couldn’t help asking: would we have placed higher if I hadn’t ZNFd? (Or maybe I should call it “Zwiftusinteruptis”, “Zenied”, “Zwiftwrecked”,”Z-railed”,”Zamboozled”, an “Electronical”… there’s a whole Facebook thread on this topic now.)

Computing what could have happened is an impossible task, of course. Would I have grabbed other sprint points? Where would I have finished? How would the points I grabbed affect the points for other teams… and my own teammates?

We finished 46 points behind 2nd place, 50 points out of 1st. So no small margin. If I had earned no further sprint points, but finished in the back of the front group with Diogo (27th) I would have earned 37 total points.


Throw in just 10 more sprint points (very possible on the Alley and Castle Sprints I missed) and we’re in 2nd place. 15 and we might have won it all.

See that spilled milk? I’m crying over it. Well done, though, to Foudre and SZ for their strong performances!

(If you’re curious: in ZRL, when a rider ZNFs like I did today, any intermediate points they earned are effectively removed from the race. As you can see in the points chart above, I keep those points, but they also aren’t included in the team total.)


Two takeaways for me this week. One is a bummer, but the other makes me happy!

First: looks like it’s back to racing on AppleTV for me. I’ve never had AppleTV crash in a Zwift session, and I can’t run the risk that another Zwift crash screws my team over again. This is a bit of a bummer, since Zwift on PC is what I’m used to, delivers better graphics, etc.

Second: apparently I can compete on some level in this B1 division! I’m happy about that, and it makes me excited for future races.

Reporting Zwift Crashes

With all my internal contacts at Zwift, I’m able to report Zwift crashes and supply logs, etc to people who can actually fix bugs. Rest assured this week’s crash was reported in detail. Zwift is looking into it, but they haven’t gotten back to me with anything concrete yet.

Windows Event Viewer indicates an exception thrown by my NVIDIA driver, but this doesn’t necessarily mean the problem is NVIDIA’s. I’m running current drivers, and it’s possible (I would even say very probable) a Zwift graphics engine bug caused the driver to crash. Here are the three relevant events from Event Viewer, for all the curious nerds:

Application Error:
Faulting application name: ZwiftApp.exe, version:, time stamp: 0x65011717
Faulting module name: nvoglv64.dll, version:, time stamp: 0x6482678a
Exception code: 0xc0000409
Fault offset: 0x0000000001941505
Faulting process id: 0x0x27CC
Faulting application start time: 0x0x1D9EB12ADE4ABBC
Faulting application path: C:\Program Files (x86)\Zwift\ZwiftApp.exe
Faulting module path: C:\WINDOWS\System32\DriverStore\FileRepository\nv_dispi.inf_amd64_675be35f1ba2315e\nvoglv64.dll
Report Id: f4ce65bf-ca31-4847-b8b1-8471d2c3ac3f
Faulting package full name:
Faulting package-relative application ID:

NVIDIA OpenGL Driver:
Unable to recover from a kernel exception. The application must close.

Error code: 3 (subcode 7)
 (pid=10188 tid=4704 zwiftapp.exe 64bit)

Visit for more information.

The description for Event ID 0 from source nvlddmkm cannot be found. Either the component that raises this event is not installed on your local computer or the installation is corrupted. You can install or repair the component on the local computer.

If the event originated on another computer, the display information had to be saved with the event.

The following information was included with the event: 

Error occurred on GPUID: 100

The message resource is present but the message was not found in the message table

Corrupt FIT Files

Another bit of Zwift minutiae: when Zwift crashes, it typically corrupts your in-progress FIT file so it can’t be manually uploaded to Strava.

The fix is easy on PC: run that FIT file through‘s “Time Adjuster,” which will fix the corrupted timestamps. Upload that fixed file and you’re golden.

Questions and Comments

How did your Makuri 40 race go? Share below!

Eric Schlange
Eric Schlange
Eric runs Zwift Insider in his spare time when he isn't on the bike or managing various business interests. He lives in Northern California with his beautiful wife, two kids and dog. Follow on Strava


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2 months ago

Once you go Mac, you never go back

2 months ago

Had exactly the same on my iPad (never happened before), although shortly after the 4th sprint. At that point I had 43 points, do you think if I’d continued to pedal round blind with the companion app open I’d have in effect remained in the race?

2 months ago
Reply to  Dixon

Yes, apple tv crashed/froze for me 30 mins in but i was able to finish race a save via companion app. Was v difficult looking at a dot on the map but my team mates were also able to guide me.

2 months ago
Reply to  Brewski

Same thing happened to me in last week’s ZRL race, on my Apple TV the Zwift app just froze but like you I was able to use the Companion App to finish the race. Virtual mechanicals suck.

2 months ago
Reply to  Eric Schlange

I was surprised because I’ve been using Zwift on Apple TV for a few years and that was the first virtual mechanical, it had been so dependable until then.

2 months ago
Reply to  Eric Schlange

I had a Zwift crash on PC last week during a workout but it was more like a frozen display. No companion app (having connectivity issues with it regardless of whether I’m using Apple TV or PC, and none of the solutions posted on here or other forums have worked) but I was able to complete the workout by continuing to pedal. I was also able to upload the FIT file to Strava without issues a few days later.

1 month ago
Reply to  Eric Schlange

I wish I’d realised this at the time! I’d certainly have cruised round and finished. Lesson learnt if it happens again…

2 months ago

My Mac crashed in that in my ZRL race last week, too. With 3.4k to go.
A clubmate also had a crash on that course. PC, I think.

2 months ago
Reply to  Mark

And I had earned FTS points for the fist time ever. So I really feel your pain, Eric.

A. Braat
A. Braat
2 months ago

For me, Zwift crashed in the first race when crossing the finish line.
In the beginning, the race was not visible in my companion app, but I was listed in the results in the companion app with my teammates. Ultimately the race also showed up for me, albeit with only 26.8Km instead of more than 30Km. Fortunately, my points did remain.

Gavin S
Gavin S
2 months ago

I’ve had this twice recently (having never had issues before), both times with nVidia drivers updating themselves mid-game. There was some chatter about it on ZPCMR.

Harry Legs
Harry Legs
2 months ago

Given the Zwift platform’s development record/problems, the widespread use of things like Sauce, and the pace of recent changes to the code base etc I am a little surprised there is not more common knowledge and widespread discussion that Zwift issues/crashes can be induced.

2 months ago

I’ve had 2 Apple TV crashes in the last month, had to pull the power cord out to fully reset

Joel Gross
1 month ago

I am on PC and rarely ever have crashes. If you are running screen recording programs or Sauce for Zwift or streaming programs – any of those can cause a crash.

1 month ago

Had my ATV freeze for the first time in months on it. A gloriously brutal 5.7km ridden. There’s something about Makuri, it seems to cause so many performance problems and higher chance of crashing… Whatever the platform. That’s after pulling my plug on the first race as we mistaken started 7… At least I finished the TTT well! 🤣 🙄

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