Microsoft (R) Visual C# Compiler version 2.9.1.65535 (9d34608e) Copyright (C) Microsoft Corporation.

Unity Engine
1

Hello
I have a problem. Few day ago, I start unity and this error appear on console:

Microsoft (R) Visual C# Compiler version 2.9.1.65535 (9d34608e)
Copyright (C) Microsoft Corporation. All rights reserved.
error CS1704: An assembly with the same simple name 'Editor' has already been imported. Try removing one of the references (e.g. 'D:\unity_project\jeux\blabla\Library\ScriptAssemblies\Editor.dll') or sign them to enable side-by-side.
Assets\Standard Assets\Utility\ForcedReset.cs(6,27): warning CS0618: 'GUITexture' is obsolete: 'This component is part of the legacy UI system and will be removed in a future release.'
Assets\Standard Assets\Utility\SimpleActivatorMenu.cs(10,16): warning CS0618: 'GUIText' is obsolete: 'This component is part of the legacy UI system and will be removed in a future release.'

Iā€™ve delete ā€œLibraryā€ folder and rebuild my project but the problem still appear.

Do you have any idea how can I fix my issue ?

Thank you

2

Ok i have solve the error, just move the folders:
UnityPurchasing and UnityPurchasing.meta in another folder.

I hope these useful.
by

11 Likes
3

Thank you

1 Like
4

Thank you, exactly you say above. i just need rename the folder project.

5

Simple, I just resolved by deleting the Facebook folder inside the (PLAYBACK) directory of the editor I use.
This is the Patch:

C: \ Program Files \ Unity \ Hub \ Editor \ 2019.2.3f1 \ Editor \ Data \ PlaybackEngines

2 Likes
6

Am getting on OSX. Donā€™t have any Facebook folder, no UnityPurchasing and no UnityPurchasing.meta ā€¦ :confused:
Anyone have any other ideas?

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4 Likes
7

I fixed my issues with this by closing and restarting Unity. Nothing about the error seemed like a real error, and it may indeed be different than those reported above, but I wanted to mention what I did in case it helps.

The error I got listed only the compiler version and Microsoft copyright notice lines, I couldnā€™t clear it at all, and I didnā€™t recognize any relevant information in the Editor logs. I got the error today after updating the mono-devel and related packages on my installation of Fedora 30, using Unity 2019.1.7f1.

Iā€™ve gotten a few odd errors like this after updating that supporting software. They donā€™t say much and donā€™t budge until I restart Unity, after which they disappear. Iā€™m thinking I wonā€™t see them anymore after I do a fresh restart of the whole system later tonight.

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9

Hi, in my experience, this error apears when i downloaded the Monetization 3.0 pack. My ā€œpackage managerā€ tab in Window->Package Manager it was gone, and i realised that the problem was that i had two different package managing ads, so this cause assembly errors.

So I went to the Package folder of the project, inside i found the ā€œmanifest.jsonā€ file.
I got inside the file and deleted the line:
ā€œcom.unity.adsā€: ā€œ2.3.1ā€,

Hope this help.

pd: sorry about my english.

3 Likes
10

Iā€™m getting the similar issues (and have for each upgrade of Unity for the past year or so). Note: Iā€™ve been using Unity since 2009 and these issues are orders of magnitude worse than anything prior added together!

I tried to run a new project using 2019.3.6 and .7 and kept getting these errors. I uninstalled all versions re-installed, made empty projects, template-drive ones, etc, all with the same result. Searching on the internet, submitting bug reports to you - nothing works.

Is this an issue with everyone or what? Itā€™s terrible!

---------- Typical Error ---------------- Microsoft (R) Visual C# Compiler version 2.9.1.65535 (9d34608e)
Copyright (C) Microsoft Corporation. All rights reserved.

error CS0009: Metadata file ā€˜/Applications/Unity/2019.3.7f1/Unity.app/Contents/NetStandard/compat/2.0.0/shims/netfx/System.Numerics.dllā€™ could not be opened ā€“ Read out of bounds.

-Mike

11

I have exactly the same error on Mac OSX 10.13.6

12

Just restart the editor. That fixed for me.

13

Hello Did you solve it??
If yes then please help me

1 Like
14

we cant restart editor every time man.

4 Likes
15

For me , in Windows, there was no description for error and deleting library folder, and restarting windows didnā€™t work
based on ā€œFlorian Lavorelā€ answer at this topic: Unity 2019.3.0a7: Microsoft Visual C# Compiler Errors - Stack Overflow I deleted this registry key and done! problem was fixed:

it may fix the problem for someone else also :slight_smile:

8 Likes
16

Yeah, I agree. For me the complaint is very very rare. Iā€™ve been using Unity for the past 2 years and until now, I have had that issue for 2 or 3 times only. So in that case itā€™s okay if I simply restart my editor. But if itā€™s a persistent error you are constantly having, then you need to find some fix to it.

17

usually if we create a new c# scirpt or if we delete an existing c# script ,unity will reloadā€¦and the error will be clearedā€¦

18

just edit any of your code or the script that is showing in the console (for example by adding comments or deleting comments like that),then the scripts will get reloaded ā€¦and error will get cleared

19

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I have the same problem. I tried to reinstall, update and all tipps of this discusion, but nothing worked. It is on every project and also on new created projects on every version. I really want to work on my project. I hope itā€™s not gone forever. Please help. Thanks :expressionless: -Purpurax

1 Like
20

Just restart the editor. thatā€™s working for me