# "Memory Access Out of Bounds" Error in New Lab (RNA Copy Machine - Round 1)

**URL:** https://forum.eternagame.org/t/memory-access-out-of-bounds-error-in-new-lab-rna-copy-machine-round-1/5795
**Category:** Bug Reports
**Created:** [August 3, 2026, 3:12pm UTC](https://forum.eternagame.org/t/memory-access-out-of-bounds-error-in-new-lab-rna-copy-machine-round-1/5795 "2026-08-03T15:12:01Z")
**Posts on this page:** 1
**Page:** 1

<div class="post-metadata">

### Author: ![lroppy](https://forum.eternagame.org/letter_avatar_proxy/v4/letter/l/8baadc/32.png) [@lroppy](https://forum.eternagame.org/u/lroppy)
#### Post date: [August 3, 2026, 3:12pm UTC](https://forum.eternagame.org/t/memory-access-out-of-bounds-error-in-new-lab-rna-copy-machine-round-1/5795/1 "2026-08-03T15:12:01Z")

</div>

After designing for a while (43 changes) in chrome, I get the error following the === line

After getting this error, I tried closing and reopening the browser tab, however the error persists when I reopen the tab.  
The error pops up again when I hit the {space bar} to switch from target to natural mode, making the tab unusable

======================================================================

RuntimeError: memory access out of bounds  
at rnapuzzler.wasm.emscripten\_builtin\_malloc (wasm://wasm/rnapuzzler.wasm-000724e6:wasm-function[63]:0x267c)  
at rnapuzzler.wasm.vrna\_alloc (wasm://wasm/rnapuzzler.wasm-000724e6:wasm-function[31]:0xa38)  
at rnapuzzler.wasm.GetLayout(std::\_\_2::basic\_string\<char, std::\_\_2::char\_traits, std::\_\_2::allocator\> const&) (wasm://wasm/rnapuzzler.wasm-000724e6:wasm-function[227]:0x1397f)  
at rnapuzzler.wasm.emscripten::internal::Invoker\<emscripten::internal::rvp::default\_tag, LayoutResult\*, std::\_\_2::basic\_string\<char, std::\_\_2::char\_traits, std::\_\_2::allocator\> const&\>::invoke(LayoutResult\* (_)(std::\_\_2::basic\_string\<char, std::\_\_2::char\_traits, std::\_\_2::allocator\> const&), emscripten::internal::BindingType\<std::\_\_2::basic\_string\<char, std::\_\_2::char\_traits, std::\_\_2::allocator\>, void\>::‘unnamed’_) (wasm://wasm/rnapuzzler.wasm-000724e6:wasm-function[194]:0x11e62)  
at Object.GetLayout (eval at ([https://eternagame.org/eternajs/dist/prod/bundles/873cd13740b0b633ddbe.js:1:41532](https://eternagame.org/eternajs/dist/prod/bundles/873cd13740b0b633ddbe.js:1:41532)), :5:10)  
at e.value ([https://eternagame.org/eternajs/dist/prod/main.8199519df848ddf67fe6.js:2:726062](https://eternagame.org/eternajs/dist/prod/main.8199519df848ddf67fe6.js:2:726062))  
at t.value ([https://eternagame.org/eternajs/dist/prod/main.8199519df848ddf67fe6.js:2:741744](https://eternagame.org/eternajs/dist/prod/main.8199519df848ddf67fe6.js:2:741744))  
at t.value ([https://eternagame.org/eternajs/dist/prod/main.8199519df848ddf67fe6.js:2:741818](https://eternagame.org/eternajs/dist/prod/main.8199519df848ddf67fe6.js:2:741818))  
at t.value ([https://eternagame.org/eternajs/dist/prod/main.8199519df848ddf67fe6.js:2:731797](https://eternagame.org/eternajs/dist/prod/main.8199519df848ddf67fe6.js:2:731797))  
at e.value ([https://eternagame.org/eternajs/dist/prod/main.8199519df848ddf67fe6.js:2:1237905](https://eternagame.org/eternajs/dist/prod/main.8199519df848ddf67fe6.js:2:1237905))