Bug Android: DllNotFoundException when using System calls such as ToString() or DateTime.Now

Running on Android 5.1.1 (Nexus 10 tablet) and I'm getting this error:

Code (CSharp):

1. DllNotFoundException: /data/app/com.DefaultCompany.project-1/lib/arm/libmono-native.so assembly:<unknown assembly> type:<unknown type> member:(null)

using ECS, unity physics, hybrid renderer, burst, and Mono
Unity version 2021.2.11f1
logcat:

Code (CSharp):

1. linker lib_burst_generated.so: unused DT entry: type 0x6ffffef5 arg 0x28708
2. linker lib_burst_generated.so: unused DT entry: type 0x6ffffffe arg 0x2bee8
3. linker lib_burst_generated.so: unused DT entry: type 0x6fffffff arg 0x2
4. linker libmono-native.so: unused DT entry: type 0x6ffffffe arg 0x2150
5. linker libmono-native.so: unused DT entry: type 0x6fffffff arg 0x2
6. linker libmono-native.so: unused DT entry: type 0x6ffffffe arg 0x2150
7. linker libmono-native.so: unused DT entry: type 0x6fffffff arg 0x2
8. linker libmono-native.so: unused DT entry: type 0x6ffffffe arg 0x2150
9. linker libmono-native.so: unused DT entry: type 0x6fffffff arg 0x2
10. linker libmono-native.so: unused DT entry: type 0x6ffffffe arg 0x2150
11. linker libmono-native.so: unused DT entry: type 0x6fffffff arg 0x2
12. linker libmono-native.so: unused DT entry: type 0x6ffffffe arg 0x2150
13. linker libmono-native.so: unused DT entry: type 0x6fffffff arg 0x2
14. linker libmono-native.so: unused DT entry: type 0x6ffffffe arg 0x2150
15. linker libmono-native.so: unused DT entry: type 0x6fffffff arg 0x2
16. linker libmono-native.so: unused DT entry: type 0x6ffffffe arg 0x2150
17. linker libmono-native.so: unused DT entry: type 0x6fffffff arg 0x2
18. linker libmono-native.so: unused DT entry: type 0x6ffffffe arg 0x2150
19. linker libmono-native.so: unused DT entry: type 0x6fffffff arg 0x2
20. linker libmono-native.so: unused DT entry: type 0x6ffffffe arg 0x2150
21. linker libmono-native.so: unused DT entry: type 0x6fffffff arg 0x2
22. linker libmono-native.so: unused DT entry: type 0x6ffffffe arg 0x2150
23. linker libmono-native.so: unused DT entry: type 0x6fffffff arg 0x2
24. linker libmono-native.so: unused DT entry: type 0x6ffffffe arg 0x2150
25. linker libmono-native.so: unused DT entry: type 0x6fffffff arg 0x2
26. linker libmono-native.so: unused DT entry: type 0x6ffffffe arg 0x2150
27. linker libmono-native.so: unused DT entry: type 0x6fffffff arg 0x2
28. linker libmono-native.so: unused DT entry: type 0x6ffffffe arg 0x2150
29. linker libmono-native.so: unused DT entry: type 0x6fffffff arg 0x2
30. linker libmono-native.so: unused DT entry: type 0x6ffffffe arg 0x2150
31. linker libmono-native.so: unused DT entry: type 0x6fffffff arg 0x2
32. linker libmono-native.so: unused DT entry: type 0x6ffffffe arg 0x2150
33. linker libmono-native.so: unused DT entry: type 0x6fffffff arg 0x2
34. linker libmono-native.so: unused DT entry: type 0x6ffffffe arg 0x2150
35. linker libmono-native.so: unused DT entry: type 0x6fffffff arg 0x2
36. linker libmono-native.so: unused DT entry: type 0x6ffffffe arg 0x2150
37. linker libmono-native.so: unused DT entry: type 0x6fffffff arg 0x2
38. linker libmono-native.so: unused DT entry: type 0x6ffffffe arg 0x2150
39. linker libmono-native.so: unused DT entry: type 0x6fffffff arg 0x2
40. linker libmono-native.so: unused DT entry: type 0x6ffffffe arg 0x2150
41. linker libmono-native.so: unused DT entry: type 0x6fffffff arg 0x2
42. linker libmono-native.so: unused DT entry: type 0x6ffffffe arg 0x2150
43. linker libmono-native.so: unused DT entry: type 0x6fffffff arg 0x2
44. Unity DllNotFoundException: /data/app/com.DefaultCompany.project-1/lib/arm/libmono-native.so assembly:<unknown assembly> type:<unknown type> member:(null)
45. Unity   at (wrapper managed-to-native) Interop+Sys.LChflagsCanSetHiddenFlag()
46. Unity   at Interop+Sys..cctor () [0x00000] in <8381b4eb633d4e20a2796f7a88eaf7e5>:0
47. Unity Rethrow as TypeInitializationException: The type initializer for 'Sys' threw an exception.
48. Unity  at System.IO.FileSystem.FileExists (System.ReadOnlySpan`1[T] fullPath, System.Int32 fileType, Interop+ErrorInfo& errorInfo) [0x00007] in <8381b4eb633d4e20a2796f7a88eaf7e5>:0
49. Unity  at System.IO.FileSystem.FileExists (System.ReadOnlySpan`1[T] fullPath) [0x00006] in <8381b4eb633d4e20a2796f7a88eaf7e5>:0
50. Unity   at System.IO.File.Exists (System.String path) [0x00043] in <8381b4eb633d4e20a2796f7a88eaf7e5>:0
51. Unity   at Unity.Scenes.LiveLinkUtility.ReadPlayerLiveLinkCacheGUID () [0x00010] in <6b899379367449fdbe23c1d59f68211f>:0
52. Unity   at Unity.Scenes.LiveLinkUtility.LiveLinkBoot () [0x00053] in <6b899379367449fdbe23c1d59f68211f>:0
53. Unity   a
54. Unity DllNotFoundException: /data/app/com.DefaultCompany.project-1/lib/arm/libmono-native.so assembly:<unknown assembly> type:<unknown type> member:(null)
55. Unity   at (wrapper managed-to-native) Interop+Sys.LChflagsCanSetHiddenFlag()
56. Unity   at Interop+Sys..cctor () [0x00000] in <8381b4eb633d4e20a2796f7a88eaf7e5>:0
57. Unity Rethrow as TypeInitializationException: The type initializer for 'Sys' threw an exception.
58. Unity  at System.IO.FileSystem.FileExists (System.ReadOnlySpan`1[T] fullPath, System.Int32 fileType, Interop+ErrorInfo& errorInfo) [0x00007] in <8381b4eb633d4e20a2796f7a88eaf7e5>:0
59. Unity  at System.IO.FileSystem.FileExists (System.ReadOnlySpan`1[T] fullPath) [0x00006] in <8381b4eb633d4e20a2796f7a88eaf7e5>:0
60. Unity   at System.IO.File.Exists (System.String path) [0x00043] in <8381b4eb633d4e20a2796f7a88eaf7e5>:0
61. Unity   at Unity.Scenes.SceneSystem.OnCreate () [0x00052] in <6b899379367449fdbe23c1d59f68211f>:0
62. Unity  at Unity.Entities.ComponentSystemBase.CreateInstance (Unity.Entities.World world, Unity.Entities.SystemState* statePtr) [0x00
63.  

I suspect the Nexus 10 is just too old. Running on 10 years with Android 5.1.1 as its maximum upgradable version

 

Turns out this bug happens when using System calls, such as ToString() or System.DateTime.Now, when building on Android (Nexus 10 android v5.1.1) using Mono. The error does not happen when building on IL2CPP

I've submitted a bug report to Unity

 

Just so you know, I suspect that Unity will support Mono less and less and less until it just stops working.

This is simply because mainline Google Play store requires apps to be compiled in 64bit, which requires IL2CPP.

 

Yeah, I just read last night that Google is requiring 64bit builds. Its unfortunate because half of my devices fail to build on IL2CPP, especially when using preview packages such as Entities

 

That is where you should file your bugs!

Obviously it's unlikely they'll fix any version of Entities besides latest and greatest.

 

I will!

 

Any news about this ? Can you link your bug report ?

 

email from unity: