# Huge show stopping bug **URL:** \ **Category:** Bug Reports\ **Created:** [August 24, 2026, 12:28am UTC](https://community.revolutionarygamesstudio.com/t/huge-show-stopping-bug/9130 "2026-08-24T00:28:19Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![the\_rocketman](https://thrivecommunity-cdn.b-cdn.net/letter_avatar_proxy/v4/letter/t/6f9a4e/32.png) [@the\_rocketman](https://community.revolutionarygamesstudio.com/u/the_rocketman)\ **Post date:** [August 24, 2026, 12:28am UTC](https://community.revolutionarygamesstudio.com/t/huge-show-stopping-bug/9130/1 "2026-08-24T00:28:20Z")
I got out of the multicellular editor in sandbox mode only to see that the game spat out a huge error log and hundreds of unhandled errors and my cell disappeared and the whole game became unplayable ☹ I restarted the game and the same thing happened ---
**Author:** ![AnthropocenianAge](https://thrivecommunity-cdn.b-cdn.net/user_avatar/community.revolutionarygamesstudio.com/anthropocenianage/32/16095_2.png) [@AnthropocenianAge](https://community.revolutionarygamesstudio.com/u/AnthropocenianAge)\ **Post date:** [August 24, 2026, 12:31am UTC](https://community.revolutionarygamesstudio.com/t/huge-show-stopping-bug/9130/2 "2026-08-24T00:31:27Z")
Did you save the error log? It could be every useful for the head dev, hhyyrylainen, to see it. If you do have it, please paste it at pastebin, since it might to be too long to paste it on the forums directly. ---
**Author:** ![aah31415](https://thrivecommunity-cdn.b-cdn.net/user_avatar/community.revolutionarygamesstudio.com/aah31415/32/14564_2.png) [@aah31415](https://community.revolutionarygamesstudio.com/u/aah31415)\ **Post date:** [August 24, 2026, 12:46am UTC](https://community.revolutionarygamesstudio.com/t/huge-show-stopping-bug/9130/3 "2026-08-24T00:46:12Z")
Did the multicellular organisms you designed in the sandbox have any unusual characteristics, such as excessive size or strange shape, that you think could have triggered the bug? ---
**Author:** ![hhyyrylainen](https://thrivecommunity-cdn.b-cdn.net/user_avatar/community.revolutionarygamesstudio.com/hhyyrylainen/32/32_2.png) [@hhyyrylainen](https://community.revolutionarygamesstudio.com/u/hhyyrylainen)\ **Post date:** [August 24, 2026, 6:17am UTC](https://community.revolutionarygamesstudio.com/t/huge-show-stopping-bug/9130/4 "2026-08-24T06:17:35Z")
Unless there’s the error log still available, or some known way to trigger the error again, there’s unfortunately nothing I can do about this problem. ---
**Author:** ![the\_rocketman](https://thrivecommunity-cdn.b-cdn.net/letter_avatar_proxy/v4/letter/t/6f9a4e/32.png) [@the\_rocketman](https://community.revolutionarygamesstudio.com/u/the_rocketman)\ **Post date:** [August 27, 2026, 11:13pm UTC](https://community.revolutionarygamesstudio.com/t/huge-show-stopping-bug/9130/5 "2026-08-27T23:13:48Z")
is the error log the big long message the game spits out? if it is I don’t know how I’m supposed to show it ---
**Author:** ![aah31415](https://thrivecommunity-cdn.b-cdn.net/user_avatar/community.revolutionarygamesstudio.com/aah31415/32/14564_2.png) [@aah31415](https://community.revolutionarygamesstudio.com/u/aah31415)\ **Post date:** [August 27, 2026, 11:16pm UTC](https://community.revolutionarygamesstudio.com/t/huge-show-stopping-bug/9130/6 "2026-08-27T23:16:26Z")
Yes it is that message when it shows up you can copy it to clipboard then go to [pastebin.com](http://pastebin.com) and paste the thing into it and share the link to that pastebin of the log with us ---
**Author:** ![the\_rocketman](https://thrivecommunity-cdn.b-cdn.net/letter_avatar_proxy/v4/letter/t/6f9a4e/32.png) [@the\_rocketman](https://community.revolutionarygamesstudio.com/u/the_rocketman)\ **Post date:** [August 28, 2026, 5:57pm UTC](https://community.revolutionarygamesstudio.com/t/huge-show-stopping-bug/9130/7 "2026-08-28T17:57:55Z")
okay I got the paste [huge error log - Pastebin.com](https://pastebin.com/7SY8im9j) ---
**Author:** ![hhyyrylainen](https://thrivecommunity-cdn.b-cdn.net/user_avatar/community.revolutionarygamesstudio.com/hhyyrylainen/32/32_2.png) [@hhyyrylainen](https://community.revolutionarygamesstudio.com/u/hhyyrylainen)\ **Post date:** [August 30, 2026, 1:12pm UTC](https://community.revolutionarygamesstudio.com/t/huge-show-stopping-bug/9130/8 "2026-08-30T13:12:14Z")
Okay, so here’s the error for reference: ```auto Simulation system failure (threaded run for main thread): System.ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection. (Parameter 'index') at Systems.MicrobeVisualsSystem.GetMulticellularMembraneDataIfReadyOrStartGenerating(CellTemplate cellProperties, OrganelleLayout`1 organelleContainer, Int64 leaderCellId, Int64 cellId, MulticellularSpeciesMember& multicellular, MulticellularGrowth& growthOrder, Int32 currentCellIndex, Int32 nextBodyPlanCellToGrowIndex) in /home/hhyyrylainen/Projects/Thrive/src/microbe_stage/systems/MicrobeVisualsSystem.cs:line 394 at MicrobeWorldSimulation.OnProcessFixedWithThreads(Single delta) in /home/hhyyrylainen/Projects/Thrive/src/microbe_stage/MicrobeWorldSimulation.generated.cs:line 217 ``` And I think it might be the problem that was reported also by other people that if you reduce the number of cells in your body plan, then the membrane builds will fail for existing members who had more cells than the species now has. As fix was made for that bug as identified and it will be in today’s release. ---
**Author:** ![the\_rocketman](https://thrivecommunity-cdn.b-cdn.net/letter_avatar_proxy/v4/letter/t/6f9a4e/32.png) [@the\_rocketman](https://community.revolutionarygamesstudio.com/u/the_rocketman)\ **Post date:** [August 31, 2026, 12:28am UTC](https://community.revolutionarygamesstudio.com/t/huge-show-stopping-bug/9130/9 "2026-08-31T00:28:41Z")
N I C E and thank you for seeing this and I thank you and your team for patching it 🙂