Got that error as well for RL 3.2.1. Easy fix, you just need to download Java JDK 26 and install it

First mentioned here:

https://www.lemmingsforums.net/index.php?topic=1671.msg42011#msg42011

Their post contains a dead link, but I'm assuming it's this one the link refers to:

https://www.lemmingsforums.net/index.php?topic=1647.msg41764#msg41764

@Mobiethian, @Pieuw, @Nessy

Thanks for the kinds words and compliments!

Just a quick update here, and that is in addition to updating the level completion counter from 21/125 to 22/125, after some thinking, yea, I don't know what I was thinking That "Mass Suicide" level is way too difficult to be the third level of the pack, let alone a first rank one. If anything, it's more of either a second or third rank level and is probably similar in difficulty to the 1-of-everything Marble level in the second rank of Lemmings Reunion. I'm certain my level's nowhere near as hard as Pieuw's level for which the title is a reference though  

So, I've made a replacement level for "Mass Suicide" that should be a lot easier


A Classic Biolab Bootup

update July 11, 2026: Reuploaded image to fix backroute I discovered

This level was inspired by the first level of Icho's Lemmings United pack, "Biolab Bootup." Like Icho's level, it's a 1-of-everything and is meant to be a quick review for players on how the classic 8 skills of the game work before I throw in easier X-of-everythings that will follow later in the rank Even then, I still threw in a few extra punches and gotcha's into the level you need to be careful of

"Mass Suicide" doesn't do its intended purpose as a quick review for players on what the classic 8 skills of the game do, as it demands some advanced stuff and goes beyond what they do that makes it way too difficult, even for a 1-of-everything

Quote from: Mobiethian on July 08, 2026, 12:36:14 AMThis is so amazing, kaywhyn! Keep up your wonderful work, you're doing great!

Thank you for your amazing support as always!    

Quote from: Pieuw on July 08, 2026, 12:52:31 PMKeep up the good work kaywhyn! Seems like we got similar ways of working on our Lemmings projects: very slowly and sporadically

Indeed, our stuff is ready when it's ready The nice thing about taking our packs slow is that it generally means a higher quality pack in the end

Quote from: Nessy on July 09, 2026, 01:50:12 AMThese levels look fantastic! Keep up the good work!

I also love reading your detailed thought processes on how you adapted your inspirations into your own levels. I think it ties nicely into the pack's themes, but in this case, the memories you formed playing other levels

Yup, excellent observation! That is indeed what's been happening with the first rank level material I've completed so far, being based and inspired by levels from other level packs I've already stated it to you, but there's a few Lemmings Destination levels that have inspired some levels of my own that I'll be making for my Lemmings Memories pack!    

What great timing! Just as Icho has posted an update for his Lemmings Isolation pack earlier today, I too am posting an update for my pack!

Wow, it's been a little over a half year since my last post, but I'm happy to say that I've recently resumed work again on the pack! In particular, I made two new levels over the weekend and completed a third one just now. With these, I finally have first rank material for the pack, as well as have 21/125 levels completed! I've updated the level completion counter in the OP.

Here are screenshots of the new levels:


Just Take A Nice, Long Walk In The Park!

This will be the first level of the pack. Notice something? That's right, it's a self-solving level! See how nice I am? Despite how I keep ragging about how Lemmings Memories is shaping up to be a really hard pack based on the limited feedback I've received, you get a freebie with this level

The level was inspired by the first level of SubLems and also the first level of Lemmings Plus I. Colorful Arty's level is called "This is a walk in the park!," while namida's is called "Just Walk!" In addition to being self-solving levels, they are also Dirt levels. I decided to make mine with a way more complicated layout than either level


Tabula Rasa

This will be the second level of the pack. There is also a level from GeoffLems called "Tabula Rasa," but unlike their level, mine is a no skills level just like Nice, Long Walk In The Park, albeit a non-trivial one I'm pretty much going by the pack theme of the first rank of Vague of one having little to no recollection of memories when we are first born. Hence the concept of tabula rasa, the idea that the mind is an empty slate in the beginning.

Also thank you to the friend of mine who suggested I make a level with this title!


How Do We Prevent a Mass Suicide?

Third level of the pack and one where I finally provide skills. 1-of-everything in the classic 8, to be exact The title is a reference to a Hurricane level of Pieuw's from PimoLems called "How To Prevent A Mass Suicide." It's one of the hardest levels of the pack IMO and it had me stumped for a really long time back in the days, but it has a really beautiful solution and was a very satisfying solve once I did figure it out I also learned a new trick in the process! For my level, the solution doesn't resemble anything like Pieuw's level, but the concept of stopping the crowd from getting into danger, which they pretty much face at every turn and corner unless you do something about it to prevent it        

@Simon

All right, thanks for the explanation and clarification!

Quote from: Simon on July 04, 2026, 12:09:49 PMOh No, Not Again was a level by tseug.
Oh Yes, Here Again is a variant tseug's level by Nepster.

I remember tseug's level, and IIRC I honestly didn't find the level that bad when I first played it in the Lemmini version of Revenge of the Lemmings all those years ago, back around 2017/2018. It is the final level in Lemmini's version, while it's close to the final level in a really early NL version. It is in some ways pretty anti-climatic to be the final level of RotL, though interestingly enough I had a lot of trouble with the level earlier this year when I played the NL version of RotL. One contributing factor is the extremely huge lapse of time since I last played and solved the level on Lemmini, almost 8 years ago. Not to mention I generally prefer to figure out and solve levels again from scratch instead of running a solving replay I might have, as I think this is great for exercising one's brain, no matter how long it's been.

At the same time, another factor would be due to Lemmini RR system working very different from NL's and hence you can't quite translate the solution the exact same way. Even then, I believe the level is slightly different on NL than on Lemmini due to changes I think mobius made. Also, it's likely I made the solution far harder than I needed to, but even nastier is the really harsh time limit. Even with the extra seconds in NL compared to the 2 minutes in Lemmini, it's still very tight.

IIRC I think it took geoo a while to solve the level? Or was it ccexplore? Will need to dig out tseug's level pack topic again.

Nepster's level I'm not aware, though that's probably because it's a Lix level and not a NL one? I myself would love to take a look at NepsterLix at some point. My biggest accomplishment was finally solving all of NepsterLems back in May 2023. Before this, I had started his NL pack sometime in 2020 while I was on my quest to conquer all of Icho's Lemmings United. I reached the former's "Thin Layers" level around September 2020 and had the level unsolved for nearly 3 years because it had stumped me very badly. During the almost 3 years the level was unsolved, I occasionally came back to the level but to no avail. Then, I finally got the level solved May 2023 and proceeded to smash through the remaining 20 levels of Nepster's pack in very short order. Hence, I finally solved all of the pack, even if it took me nearly 3 years to do so!

Anyway, it was intentional I subverted the expectation of my Oh No level being the harder of the Oh Yes/Oh No pair, because... why not?

QuoteHmm. It's a livestream, I say what comes to mind. Solving levels is hard. No worries with the grunts or the rants. Nearly everything in a level is an annoyance (in the widest sense) because it prevents me from solving the map.

Yea, fair enough. As I mentioned, I'm not used to hearing such groans and criticisms, if any, of my levels. Especially when they're generally very well-liked in the NL community

When I LP/stream, I guess I'm just better than most at keeping calm while trying to figure out levels, even when I'm frustrated while being very stumped. I'm currently in the process of live streaming kieran millar's custom Lemmings 2 pack Quest From Kieran 2. It's very slow going due to how very difficult the levels of the pack are, but I'm enjoying it a lot! You were right about the base L2 game being sufficient preparation for QFK2, even when I haven't seen many of these L2 skill interactions before and hence am learning them for the very first time through his pack!

Anyway, I should post my feedback in his L2 level pack topic soon! As of the second week of July 2026, I currently have 4 tribes completed and have almost a fifth one done!  

QuoteOh No/Yes came from the double-level contest, and it's up to me to guess how much terrain the routes share. I realized that late. Before, I wanted to send lemmings all across the map.

No worries. It is in a way a pretty natural inclination! I feel my levels have done their job well of being the hard levels they're supposed to be, given that you needed to join heads with those present in chat from time to time I would love to be present during your LOTY streams, but during these last few weeks while trying to sign up for Twitch I now remember why I gave up trying to sign up for a Twitch account all those years ago. Somebody apparently has a Twitch account with my username kaywhyn, and I honestly am not willing to even add anything extra to it to make an account. This recently happened to me recently at the very end of last year, where after nearly 20 years I needed to change my username for my banking account because the one I used for a really long time got locked and that I'm not able to just change my password. Needless to say, I was very upset.

So, I'll just have to be content with giving feedback after your streams! Also, I prefer YouTube over Twitch anyway despite many annoyances/bugs of the former in more recent times

Quotegeoo blames me for drilling too deep into local areas, and suggests that I broaden the search. His advice is hard to follow but probably better. At least, the drilling found some almost-backroutes (wrong ideas that almost worked) in early versions of his levels, and he was able to patch that to fail more clearly.

I too would also love to take a look at geoo's Lix pack at some point as well! I am worried that the difficulty might be too much for me. Then again, I find geoo's levels very hard in general. Nevertheless, I'm willing to face Lemmings/Lix levels of any difficulty head on!  

"Becoming Indifferent" resolved Yea, this was exactly what I tried before with the jumper version which of course doesn't work Now not only does it work, but it's definitely at a much more suitable difficulty for the Objects & Functions rank now!

Quote from: IchoTolot on July 02, 2026, 07:39:42 PMFor the ordering I went with complexity ordering rather than with theme ordering and that's why I chose to stick them to the end:

- The teleporter is rather easy alone and introducing portals and showing the differences betweeen them is quite a bit more complex, so I decided to leave a gap there.
- The neutral level was already quite hard and I wouldn't want it to be earlier in the rank. That leaves only a little gap to the neutralizer/deneutralizer introduction which needs the neutrals as a basis.

Yea, fair enough. I understand now

My replays are attached for the three new levels that use the new 12.13 NL objects. Great levels, though "Becoming Indifferent" might be a little difficult considering that I fell for the trap of being a basher short. Also, only one jumper used for "Fluctuant Knowledge"

As mentioned from quite a while back, I think the portal introduction level can be a bit closer to the level that introduces teleporters, and similarly maybe the neutralizer/deneutralizer can come a bit after the neutral Lemmings introduction level. Finally, if there is a level that introduces preplaced Lemmings with preassigned permanent skills and/or a level with preassigned trapdoors, maybe the skill assigner/deassigner tutorial can come a bit after either one. 

Quote from: namida on July 01, 2026, 09:14:57 PMI would do a search for historical forum posts by DragonsLover. I don't know if he did this track specifically, but he did a lot of Lemmings midis back in the day.

Indeed, I was curious about the Ohno modded tracks you used for Lemmings Plus II, as I had never heard them the way they sound in the pack. I grew up with Dos, and hence I know they're some modded version of the Ohno Dos tracks. Some sleuthing around led me to discovering that Dragonslover did them and then you asked if you could use them for your pack They're really nice!

Oh Yes is close to intended that it's an acceptable solution, while Oh No is completely intended. Well done!

LOL why do people insist on making my Oh Yes harder than it needs to be? Dexter was almost right about the leftover blocker.

Spoiler

Change to "eliminates the timing completely" and that would had been accurate. I don't require that the builder and miner meet at the exact same time at all! That's what the blocker is for, use it people!

Basically, after the builder turns around to the left, you simply park and make him block at a spot so that when the miner frees him after using the builder staircase to keep going, the miner tunnel's low and deep enough to turn him back towards the exit

I also don't require the stacker to be the splatform. Instead, you can simply build back far enough so that the fall is no longer fatal but then you need to interrupt him with the stacker so that everyone turns towards the right and doesn't get into danger with the trap  

For Oh No, it's possible to do it with just two climbers, but as I haven't been shown any backroute that the third climber causes, I decided to leave it in and would take it out only if it causes backroutes

Spoiler

Simply have the first climber turn around to the left first before digging. Then the rest of the solution can be done the same as before, with the platformer over the small lava pit finishing way ahead of time of the long basher from the right so that he can platform up the gap before the exit on time before the second climber arrives

Yea, I envisioned a level with the repeat where the only way to rescue the crowd is to get help from the other side due to how the basher destructive mask works. Hence the result was Oh No

Icho simply organized all the authors' levels by ABC order. This thus creates confusion due to how Oh Yes comes after Oh No alphabetically but that the former is meant to be played before the latter because the latter is the repeat version instead of the other way.

Once again, I got the impression from your groans that you're blaming me for my designs, when in fact you should play the levels before judging. I guess I'm not used to such reactions from people who play my levels on stream, particularly since it's still more common for me to play other people's levels and hence they watch me rather than me be the viewer watching others play my levels. It is true that Oh Yes uses parts of the level that Oh No doesn't, but that is intentional Keep in mind that decoration is perfectly valid level design when it comes to deceiving and throwing players off guard into thinking it's integral to the solution when it actually isn't I simply wanted to go beyond just the main areas for Oh Yes and Oh No in an effort to make them look nice. Dexter's tilesets are wonderful to look at and make levels with! I pretty much knew from the start I wanted to use his Hoard graphic set for the Oh Yes and Oh No levels

It's also amusing people are associating me with a certain level design when I really shouldn't be, as I only have 2 or 3 such levels out of the around 50 or so total I have made in the last 5 years

Spoiler

Levels that involve extending skills

Anyway, thank you for streaming and the nice compliments on my levels! Also for the resolving of my Oh Yes after I backroute fixed it    

Quote from: Guigui on June 28, 2026, 10:47:04 AMAs for destructive cancelling each others, we could also mention 2 facing bashers that will cancel each others !

Well, I'm sure you mean opposite facing bashers, but this one's obvious and not as interesting as both miners cancelling each other out, which is far less obvious In fact, I don't think the latter is even possible in Lemmix. At least last time I checked, no matter how much I tried I couldn't get both miners to stop. My guess here is that this is just due to how miners are able to cross a 1-pixel gap on Dos/Lemmix, which of course isn't possible in NL.

Excellent question. The answer to the 4th scenario of whether it's possible for the digger AND basher to both stop in NL is "no." So, don't waste your time trying to get it to happen, as you won't succeed in getting both to stop no matter what As a matter of fact, the only situation I know of where both skills can stop are two miners cancelling out each other. This is of course extremely fiddly and difficult to pull off, but it IS possible. In all other situations, such as basher and miner, miner and digger, etc., one of the 3 outcomes you already spelled out will happen, but never both will stop.

All rightie, sounds good. I appreciate you wanting to give my fix and updated Oh Yes! another go to see if it really does hold up to be the hard level it's supposed to be now

You'll also notice that all levels of mine you've played except one don't have time limits. I think you perfectly understand why "Quick Lab Rush" needs it after having solved it the intended way and trying what I thought people would try and falling for its trap

Spoiler

Otherwise, you would be able to take the long green walkway out to the left at the top with the sliders and hence you won't need to catch them with the platformer at the bottom

It's just like I promised you from a few years ago after you played my "Stop Blowing Up My Construction Work!" and complained of me possibly slapping one on just for the heck of it: I didn't arbitrarily do so, and it originally didn't have a time limit (and the first few updates didn't either), and after having considered all my other options (pickups, steel, etc), I decided the best way to fix the backroutes by you, geoo, and Armani was to put in a time limit while also making sure the solution doesn't become too obvious from using other fixes instead. Plus, I have plenty of levels that don't have a time limit anyway

Along with that, it is true that I could had used

Spoiler

OWAs for my kaywhyn's Organic National Park level instead of the visual clutter and not the so clear blue vein steel I resorted to, but again, IMO it would had made the solution too obvious.

It's also true that I'm not happy about how the intended solution has become way more precise than it needs to be, but well, sometimes that's the way it goes with level designing and with how the level kept getting backrouted  

Now I have recorded and post the rest of the LOTY2025 videos!

Part 4: https://youtu.be/iuvPgFK4y4c (Guigui's levels)

Part 5: https://youtu.be/sIih30r-gWw (my levels)

Part 6: https://youtu.be/taOhAUz6DXU (everyone else's levels, the final Mixed rank)

I've also reattached my entire replay collection, with a new replay added for GigaLem 2 so that the zip has two replays for it

I'm also reattaching my updated Oh Yes! and Oh No! levels since I fixed JawaJuice's and Simon's backroutes for them in the last few days They're also in reply #15 several posts above. 

All rightie, I've started recording and posting some LOTY2025 videos showing off my solutions and most author intended solutions!

Part 1: https://youtu.be/Vd_z3G-0-3M (92Dexter11's levels, sorry for the long video! )

Part 2: https://youtu.be/G7kXgTCJqYI (Armani's levels)

Part 3: https://youtu.be/6DRDXJRJR7U (GigaLem's levels)

Just the first three ranks for now. Will record the remaining 3 ranks after I get some rest first  

Hmm, good question Posting a new topic and rant of a specific NL graphic set in the NeoLemmix Styles board is probably fine and the best way to go about it. At the same time, that board is for any tilesets made, so perhaps not.

Then again, Nepster posted a rant about the City Tileset in the NeoLemmix Main board, so it might be more reasonable to file a report of namida's Organic set in his topic instead of creating a new one. It would mean hijacking a topic Nepster started, but as it's a rant about NL styles, it should be perfectly fine. There's plenty of posts in the topic, including some by you The current discussion in the topic is primarily on the City tileset and no other, so it might be a great time to add a few NL graphic sets that might need ranting and a discussion Also, keep in mind that when the topic was made that that is back in the days of Old Formats NL, i.e, v10 NL players instead of v12 NL (New Formats NL).

Anyway, the discussion of graphic set issues can probably be moved elsewhere now so as to not derail from LOTY here