# Crashes on IOS with nakama dynamic library
**URL:** https://forum.heroiclabs.com/t/crashes-on-ios-with-nakama-dynamic-library/2106
**Category:** Client Libraries
**Created:** [November 18, 2021, 8:25am UTC](https://forum.heroiclabs.com/t/crashes-on-ios-with-nakama-dynamic-library/2106 "2021-11-18T08:25:56Z")
**Posts on this page:** 7
**Page:** 1
### Author:  [@Elagin](https://forum.heroiclabs.com/u/Elagin)
#### Post date: [November 18, 2021, 8:25am UTC](https://forum.heroiclabs.com/t/crashes-on-ios-with-nakama-dynamic-library/2106/1 "2021-11-18T08:25:56Z")
{Details}
1. Versions: Nakama SDK version 2.4
2. Server Framework Runtime language: Go
We can not launch client on our IOS device. Android client works without problems.
```auto
Exception Codes: 0x0000000000000000, 0x0000000000000000
Exception Note: EXC_CORPSE_NOTIFY
Termination Description: DYLD, dyld: Using shared cache: D7F84FC0-3317-3485-AB1C-3D54AA184E40 | dependent dylib '@rpath/libnakama-cpp.dylib' not found for '/private/var/containers/Bundle/Application/45D9D5A0-CEE0-400A-8536-25A2F0505B9F/SpaceRangers2.app/SpaceRangers2', tried but didn't find: '/private/var/containers/Bundle/Application/45D9D5A0-CEE0-400A-8536-25A2F0505B9F/SpaceRangers2.app/Frameworks/libnakama-cpp.dylib' '@rpath/libnakama-cpp.dylib' '/usr/local/lib/libnakama-cpp.dylib' '/usr/lib/libnakama-cpp.dylib'
Highlighted by Thread: 0
Backtrace not available
Unknown thread crashed with ARM Thread State (64-bit):
x0: 0x0000000000000006 x1: 0x0000000000000001 x2: 0x000000016f1b9fe0 x3: 0x000000000000009f
x4: 0x000000016f1b9be0 x5: 0x0000000000000000 x6: 0x0000000000000000 x7: 0x0000000000000000
x8: 0x0000000000000020 x9: 0x0000000000000009 x10: 0x0000000000000001 x11: 0x000000000000004f
x12: 0x00000000000000c0 x13: 0x0000000000000033 x14: 0x0000000000000017 x15: 0x0000000000000034
x16: 0x0000000000000209 x17: 0x00000001139fb488 x18: 0x0000000000000000 x19: 0x0000000000000000
x20: 0x000000016f1b9be0 x21: 0x000000000000009f x22: 0x000000016f1b9fe0 x23: 0x0000000000000001
x24: 0x0000000000000006 x25: 0x000000016f1ba8a8 x26: 0x0000000113a24000 x27: 0x0000000113a24000
x28: 0x000000016f1bb914 fp: 0x000000016f1b9bb0 lr: 0x0000000113a09a88
sp: 0x000000016f1b9b70 pc: 0x0000000113a01848 cpsr: 0x00000000
esr: 0x00000000 Address size fault
```
---
### Author:  [@mofirouz](https://forum.heroiclabs.com/u/mofirouz)
#### Post date: [November 22, 2021, 10:21am UTC](https://forum.heroiclabs.com/t/crashes-on-ios-with-nakama-dynamic-library/2106/2 "2021-11-22T10:21:07Z")
Hi @Elagin - can you please mention what client library you are using and on what iOS device? What engine have you used to build your game?
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### Author:  [@Elagin](https://forum.heroiclabs.com/u/Elagin)
#### Post date: [November 22, 2021, 12:21pm UTC](https://forum.heroiclabs.com/t/crashes-on-ios-with-nakama-dynamic-library/2106/3 "2021-11-22T12:21:09Z")
Hi! Thank you for reply. We are using Unreal engine and Unreal sdk. So we find out that Unreal sdk use c++ library. Firstly we used prebuilded library and get this error, then we build it manually and get the same error
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### Author:  [@Elagin](https://forum.heroiclabs.com/u/Elagin)
#### Post date: [November 24, 2021, 12:07pm UTC](https://forum.heroiclabs.com/t/crashes-on-ios-with-nakama-dynamic-library/2106/5 "2021-11-24T12:07:38Z")
@mofirouz we test it on Iphone XR with ios 14 onboard
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### Author:  [@mofirouz](https://forum.heroiclabs.com/u/mofirouz)
#### Post date: [November 24, 2021, 3:32pm UTC](https://forum.heroiclabs.com/t/crashes-on-ios-with-nakama-dynamic-library/2106/6 "2021-11-24T15:32:23Z")
Thanks. Do you have an idea of where in your code this happens? Eg are you init the client or calling a function or connecting to the server?
Do you have a stacktrace that shows more details?
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### Author:  [@Elagin](https://forum.heroiclabs.com/u/Elagin)
#### Post date: [November 24, 2021, 3:35pm UTC](https://forum.heroiclabs.com/t/crashes-on-ios-with-nakama-dynamic-library/2106/7 "2021-11-24T15:35:33Z")
@mofirouz it happens when we call createDefaultClient in our GameInstance Init function, so we get crash on launch
---
### Author:  [@mofirouz](https://forum.heroiclabs.com/u/mofirouz)
#### Post date: [November 29, 2021, 10:08am UTC](https://forum.heroiclabs.com/t/crashes-on-ios-with-nakama-dynamic-library/2106/8 "2021-11-29T10:08:23Z")
Thanks @Elagin - can you please create a minimal example demonstrating the issue, and open an issue in the tracker here (with the example):
> **[Issues ยท heroiclabs/nakama-cpp](https://github.com/heroiclabs/nakama-cpp/issues)**
>
> Generic C/C++ client for Nakama server. Contribute to heroiclabs/nakama-cpp development by creating an account on GitHub.