Building fails - Copying assembly [..] TextMeshPro.dll failed

Hi everbody,

When creating AssetBundles via script we often get the following error message:

ultimately leading to: Build Failed - Errors during build process, check logs for details.

When does it happen:
Building the bundles via script, triggered from a custom menu but also via CLI (more or less same script):

This seems to be not related to the target (happens for Windows builds, but also all consoles).

Which Unity version:
It happened back on Unity 2018.2.??, but currently we are at Unity 2018.4.14f1. Upgrading to 2019 is unfortunately not an immediate option.

How often does it happen:
Seems random, about 30% of our builds fail because of that.

What platform does this occur on:
We only made builds from Windows so far, but here it happened on a wide range of computers, virtual systems on a build server as well as our regular workstations - our own and also at the porting studio we worked with.

As this issue (or a similar one) seems to happen to other people too, we obviously looked at the suggested solutions. In most cases its either "disable your antivirus" or "check for malware". We unsuccessfully tried both but as mentioned before it also happens on a wide range of machines, so its rather unlikely that they are all affected by the same software/malware. Even disabling the Windows own virus scanner didn't help...

Any help is highly appreachated!

Jan


A bit more context from the log files:

 

A small update on this:

I added PostProcessing from the PackageManager and now the error message is replaced with:

Copying assembly from 'Temp/Unity.Postprocessing.Runtime.dll' to 'Library/ScriptAssemblies/Unity.Postprocessing.Runtime.dll' failed

So it's definitely not connected to TMPro but a more generic problem.

 

Ok another small update... seems like I was wrong above. I now get both error messages. The whole build process is the following:

1. Preparing data (custom atlas maps & more)
2. Building AssetBundles with BuildPipeline.BuildAssetBundles()
   
3. Copy AssetBundles to StreamingAssets folder
4. Save AssetDatabase
   
5. Check assetBundles and some other resources
6. UnloadUnusedAssetsImmediate to free up memory from previous steps
7. Build player with BuildPipeline.BuildPlayer(buildPlayerOptions);
   -> Error building Player because scripts have compile errors in the editor

Below a part of the log file with some commends:

// Step 1

[..]

// During step 2:



- Starting compile Library/ScriptAssemblies/Megagon.Framework.Security.dll

- Starting compile Library/ScriptAssemblies/UnityStandardAssets.dll

- Finished compile Library/ScriptAssemblies/Unity.Postprocessing.Runtime.dll

Symbols will be read from Temp\Unity.Postprocessing.Runtime.pdb

Script Module: Unity.Postprocessing.Runtime.dll

Pass: 0 took 48 milliseconds

Pass: 1 took 2 milliseconds

- Finished compile Library/ScriptAssemblies/Unity.TextMeshPro.dll

Symbols will be read from Temp\Unity.TextMeshPro.pdb

Script Module: Unity.TextMeshPro.dll

Pass: 0 took 163 milliseconds

Pass: 1 took 77 milliseconds

Copying assembly from 'Temp/Unity.Postprocessing.Runtime.dll' to 'Library/ScriptAssemblies/Unity.Postprocessing.Runtime.dll' failed

(Filename: Library/ScriptAssemblies/Unity.Postprocessing.Runtime.dll Line: -1)

Copying assembly from 'Temp/Unity.TextMeshPro.dll' to 'Library/ScriptAssemblies/Unity.TextMeshPro.dll' failed

(Filename: Library/ScriptAssemblies/Unity.TextMeshPro.dll Line: -1)



DisplayProgressbar: Building AssetBundle

***Player size statistics***

Total compressed size 3.1 KB. Total uncompressed size 7.1 KB.

Unloading 47 Unused Serialized files (Serialized files now loaded: 0)

System memory in use before: 448.0 MB.

System memory in use after: 449.0 MB.

Unloading 47 unused Assets to reduce memory usage. Loaded Objects now: 12647.

Total: 71.984170 ms (FindLiveObjects: 3.672490 ms CreateObjectMapping: 1.026320 ms MarkObjects: 67.138810 ms  DeleteObjects: 0.115020 ms)

-------------------------------------------------------------------------------

Bundle Name: ui

Compressed Size:19.5 mb

Uncompressed usage by category (Percentages based on user generated assets only):

// here follows a list of all the asset bundles with size statistics...



[..]



// Step 3-6

Copy AssetBundles to StreamingAssets folder...

Saving AssetDatabase...

DisplayProgressbar: Pre-Build Check...

Pre-Build: Checking AssetBundles...

Pre-Build: Checking Terrain assets...



[..]



// Step 7:

Building target 'XboxOne' to C:/Jenkins/LMD_Workspace/Build/X1/LMD_XboxOne-MasterBuild_XboxOne...

Development Build: False

Hashing assets (1 files)... 0.032 seconds

  file read: 0.008 seconds (12.149 MB)

  wait for write: 0.000 seconds (I/O thread blocked by consumer, aka CPU bound)

  wait for read: 0.017 seconds (CPUT thread waiting for I/O thread, aka disk bound)

  hash: 0.014 seconds



Updating Assets/ResourceLibrary/Audio/fmod/alps.bytes - GUID: 63ab222f38073c945a5b1bd3a805f6d4...

 done. [Time: 89.363580 ms]

Script Compilation Pipeline Post Process Assets time: 0.000185s

Assembly Updater Post Process Assets time: 0.000220s

Refreshing native plugins compatible for Editor in 3.99 ms, found 9 plugins.

Preloading 1 native plugins for Editor in 0.43 ms.

Hashing assets (1 files)... 0.041 seconds

  file read: 0.011 seconds (15.460 MB)

  wait for write: 0.004 seconds (I/O thread blocked by consumer, aka CPU bound)

  wait for read: 0.016 seconds (CPUT thread waiting for I/O thread, aka disk bound)

  hash: 0.023 seconds

Updating Assets/ResourceLibrary/Audio/fmod/autumn.bytes - GUID: fe222925707933f4cbd5a3a7d68b55ef...

 done. [Time: 112.410780 ms]



// here follow all the other FMOD banks which seem to get updates automatically again

[ .. ]



Script Compilation Pipeline Post Process Assets time: 0.000043s

Assembly Updater Post Process Assets time: 0.000168s

Refreshing native plugins compatible for Editor in 4.05 ms, found 9 plugins.

Preloading 1 native plugins for Editor in 0.40 ms.

Script Compilation Pipeline Post Process Assets time: 0.000027s

Assembly Updater Post Process Assets time: 0.000196s

Updating ProjectSettings/ProjectSettings.asset - GUID: 00000000000000004000000000000000...

 done. [Time: 24.652580 ms]

Updating ProjectSettings/UnityConnectSettings.asset - GUID: 0000000000000000a100000000000000...

 done. [Time: 10.163050 ms]

Script Compilation Pipeline Post Process Assets time: 0.000032s

Assembly Updater Post Process Assets time: 0.000340s

Refreshing native plugins compatible for Editor in 4.13 ms, found 9 plugins.

Preloading 1 native plugins for Editor in 0.31 ms.

DisplayProgressNotification: Build Failed

Error building Player because scripts have compile errors in the editor

 

Anyone? And hints what I could try? Kind of desperate here...