(Case 1142289) TextMesh Pro: Feature `out variable declaration' cannot be used

EDIT: Here is the link to the solution:
https://forum.unity.com/threads/cas...claration-cannot-be-used.653566/#post-4435042


I opened my 2019.1.0b4 project in Unity 2019.1.0b9 and TextMesh Pro was throwing the following errors:

Spoiler: Error Messages

Code (CSharp):

1. Library/PackageCache/com.unity.textmeshpro@2.0.0/Scripts/Runtime/FastAction.cs(24,45): error CS1644: Feature `out variable declaration' cannot be used because it is not part of the C# 4.0 language specification
2. Library/PackageCache/com.unity.textmeshpro@2.0.0/Scripts/Runtime/FastAction.cs(59,45): error CS1644: Feature `out variable declaration' cannot be used because it is not part of the C# 4.0 language specification
3. Library/PackageCache/com.unity.textmeshpro@2.0.0/Scripts/Runtime/FastAction.cs(94,45): error CS1644: Feature `out variable declaration' cannot be used because it is not part of the C# 4.0 language specification
4. Library/PackageCache/com.unity.textmeshpro@2.0.0/Scripts/Runtime/FastAction.cs(129,45): error CS1644: Feature `out variable declaration' cannot be used because it is not part of the C# 4.0 language specification
5. Library/PackageCache/com.unity.textmeshpro@2.0.0/Scripts/Runtime/MaterialReferenceManager.cs(585,74): error CS1644: Feature `out variable declaration' cannot be used because it is not part of the C# 4.0 language specification
6. Library/PackageCache/com.unity.textmeshpro@2.0.0/Scripts/Runtime/MaterialReferenceManager.cs(621,74): error CS1644: Feature `out variable declaration' cannot be used because it is not part of the C# 4.0 language specification
7. Library/PackageCache/com.unity.textmeshpro@2.0.0/Scripts/Runtime/TMP_FontAsset.cs(408,82): error CS1644: Feature `out variable declaration' cannot be used because it is not part of the C# 4.0 language specification
8. Library/PackageCache/com.unity.textmeshpro@2.0.0/Scripts/Runtime/TMP_FontAsset.cs(408,99): error CS1644: Feature `out variable declaration' cannot be used because it is not part of the C# 4.0 language specification
9. Library/PackageCache/com.unity.textmeshpro@2.0.0/Scripts/Runtime/TMP_FontAsset.cs(638,69): error CS1644: Feature `out variable declaration' cannot be used because it is not part of the C# 4.0 language specification
10. Library/PackageCache/com.unity.textmeshpro@2.0.0/Scripts/Runtime/TMP_FontAsset.cs(771,60): error CS1644: Feature `out variable declaration' cannot be used because it is not part of the C# 4.0 language specification
11. Library/PackageCache/com.unity.textmeshpro@2.0.0/Scripts/Runtime/TMP_FontAsset.cs(986,51): error CS1644: Feature `out variable declaration' cannot be used because it is not part of the C# 4.0 language specification
12. Library/PackageCache/com.unity.textmeshpro@2.0.0/Scripts/Runtime/TMP_FontAsset.cs(1081,238): error CS1644: Feature `out variable declaration' cannot be used because it is not part of the C# 4.0 language specification
13. Library/PackageCache/com.unity.textmeshpro@2.0.0/Scripts/Runtime/TMP_FontAsset.cs(1098,83): error CS1644: Feature `out variable declaration' cannot be used because it is not part of the C# 4.0 language specification
14. Library/PackageCache/com.unity.textmeshpro@2.0.0/Scripts/Runtime/TMP_FontAsset.cs(1131,53): error CS1644: Feature `out variable declaration' cannot be used because it is not part of the C# 4.0 language specification
15. Library/PackageCache/com.unity.textmeshpro@2.0.0/Scripts/Runtime/TMP_FontAsset.cs(1222,238): error CS1644: Feature `out variable declaration' cannot be used because it is not part of the C# 4.0 language specification
16. Library/PackageCache/com.unity.textmeshpro@2.0.0/Scripts/Runtime/TMP_FontAsset.cs(1241,83): error CS1644: Feature `out variable declaration' cannot be used because it is not part of the C# 4.0 language specification
17. Library/PackageCache/com.unity.textmeshpro@2.0.0/Scripts/Runtime/TMP_FontAsset.cs(1306,209): error CS1644: Feature `out variable declaration' cannot be used because it is not part of the C# 4.0 language specification
18. Library/PackageCache/com.unity.textmeshpro@2.0.0/Scripts/Runtime/TMP_FontAsset.cs(1458,209): error CS1644: Feature `out variable declaration' cannot be used because it is not part of the C# 4.0 language specification
19. Library/PackageCache/com.unity.textmeshpro@2.0.0/Scripts/Runtime/TMP_FontAsset.cs(1876,82): error CS1644: Feature `out variable declaration' cannot be used because it is not part of the C# 4.0 language specification
20. Library/PackageCache/com.unity.textmeshpro@2.0.0/Scripts/Runtime/TMP_FontAsset.cs(1880,83): error CS1644: Feature `out variable declaration' cannot be used because it is not part of the C# 4.0 language specification
21. Library/PackageCache/com.unity.textmeshpro@2.0.0/Scripts/Runtime/TMP_InputField.cs(1561,148): error CS1644: Feature `out variable declaration' cannot be used because it is not part of the C# 4.0 language specification
22. Library/PackageCache/com.unity.textmeshpro@2.0.0/Scripts/Runtime/TMP_InputField.cs(1607,139): error CS1644: Feature `out variable declaration' cannot be used because it is not part of the C# 4.0 language specification
23. Library/PackageCache/com.unity.textmeshpro@2.0.0/Scripts/Runtime/TMP_InputField.cs(1682,152): error CS1644: Feature `out variable declaration' cannot be used because it is not part of the C# 4.0 language specification
24. Library/PackageCache/com.unity.textmeshpro@2.0.0/Scripts/Runtime/TMP_MaterialManager.cs(368,58): error CS1644: Feature `out variable declaration' cannot be used because it is not part of the C# 4.0 language specification
25. Library/PackageCache/com.unity.textmeshpro@2.0.0/Scripts/Runtime/TMP_MaterialManager.cs(428,68): error CS1644: Feature `out variable declaration' cannot be used because it is not part of the C# 4.0 language specification
26. Library/PackageCache/com.unity.textmeshpro@2.0.0/Scripts/Runtime/TMP_MaterialManager.cs(430,62): error CS1644: Feature `out variable declaration' cannot be used because it is not part of the C# 4.0 language specification
27. Library/PackageCache/com.unity.textmeshpro@2.0.0/Scripts/Runtime/TMP_MaterialManager.cs(450,68): error CS1644: Feature `out variable declaration' cannot be used because it is not part of the C# 4.0 language specification
28. Library/PackageCache/com.unity.textmeshpro@2.0.0/Scripts/Runtime/TMP_MaterialManager.cs(452,62): error CS1644: Feature `out variable declaration' cannot be used because it is not part of the C# 4.0 language specification
29. Library/PackageCache/com.unity.textmeshpro@2.0.0/Scripts/Runtime/TMP_MaterialManager.cs(501,70): error CS1644: Feature `out variable declaration' cannot be used because it is not part of the C# 4.0 language specification
30. Library/PackageCache/com.unity.textmeshpro@2.0.0/Scripts/Runtime/TMP_MaterialManager.cs(503,62): error CS1644: Feature `out variable declaration' cannot be used because it is not part of the C# 4.0 language specification
31. Library/PackageCache/com.unity.textmeshpro@2.0.0/Scripts/Runtime/TMP_SpriteAnimator.cs(48,65): error CS1644: Feature `out variable declaration' cannot be used because it is not part of the C# 4.0 language specification
32. Library/PackageCache/com.unity.textmeshpro@2.0.0/Scripts/Runtime/TMP_SpriteAsset.cs(170,68): error CS1644: Feature `out variable declaration' cannot be used because it is not part of the C# 4.0 language specification
33. Library/PackageCache/com.unity.textmeshpro@2.0.0/Scripts/Runtime/TMP_SpriteAsset.cs(188,56): error CS1644: Feature `out variable declaration' cannot be used because it is not part of the C# 4.0 language specification
34. Library/PackageCache/com.unity.textmeshpro@2.0.0/Scripts/Runtime/TMP_SpriteAsset.cs(205,58): error CS1644: Feature `out variable declaration' cannot be used because it is not part of the C# 4.0 language specification
35. Library/PackageCache/com.unity.textmeshpro@2.0.0/Scripts/Runtime/TMP_StyleSheet.cs(72,61): error CS1644: Feature `out variable declaration' cannot be used because it is not part of the C# 4.0 language specification
36. Library/PackageCache/com.unity.textmeshpro@2.0.0/Scripts/Runtime/TMP_Text.cs(1948,75): error CS1644: Feature `out variable declaration' cannot be used because it is not part of the C# 4.0 language specification
37. Library/PackageCache/com.unity.textmeshpro@2.0.0/Scripts/Runtime/TMP_Text.cs(2060,75): error CS1644: Feature `out variable declaration' cannot be used because it is not part of the C# 4.0 language specification
38. Library/PackageCache/com.unity.textmeshpro@2.0.0/Scripts/Runtime/TMP_Text.cs(2170,75): error CS1644: Feature `out variable declaration' cannot be used because it is not part of the C# 4.0 language specification
39. Library/PackageCache/com.unity.textmeshpro@2.0.0/Scripts/Runtime/TMP_Text.cs(2252,75): error CS1644: Feature `out variable declaration' cannot be used because it is not part of the C# 4.0 language specification
40. Library/PackageCache/com.unity.textmeshpro@2.0.0/Scripts/Runtime/TMP_Text.cs(2417,75): error CS1644: Feature `out variable declaration' cannot be used because it is not part of the C# 4.0 language specification
41. Library/PackageCache/com.unity.textmeshpro@2.0.0/Scripts/Runtime/TMP_Text.cs(2561,75): error CS1644: Feature `out variable declaration' cannot be used because it is not part of the C# 4.0 language specification
42. Library/PackageCache/com.unity.textmeshpro@2.0.0/Scripts/Runtime/TMP_Text.cs(2633,80): error CS1644: Feature `out variable declaration' cannot be used because it is not part of the C# 4.0 language specification
43. Library/PackageCache/com.unity.textmeshpro@2.0.0/Scripts/Runtime/TMP_Text.cs(2703,80): error CS1644: Feature `out variable declaration' cannot be used because it is not part of the C# 4.0 language specification
44. Library/PackageCache/com.unity.textmeshpro@2.0.0/Scripts/Runtime/TMP_Text.cs(2773,80): error CS1644: Feature `out variable declaration' cannot be used because it is not part of the C# 4.0 language specification
45. Library/PackageCache/com.unity.textmeshpro@2.0.0/Scripts/Runtime/TMP_Text.cs(2843,80): error CS1644: Feature `out variable declaration' cannot be used because it is not part of the C# 4.0 language specification
46. Library/PackageCache/com.unity.textmeshpro@2.0.0/Scripts/Runtime/TMP_Text.cs(2911,80): error CS1644: Feature `out variable declaration' cannot be used because it is not part of the C# 4.0 language specification
47. Library/PackageCache/com.unity.textmeshpro@2.0.0/Scripts/Runtime/TMP_Text.cs(2979,80): error CS1644: Feature `out variable declaration' cannot be used because it is not part of the C# 4.0 language specification
48. Library/PackageCache/com.unity.textmeshpro@2.0.0/Scripts/Runtime/TMP_Text.cs(3047,80): error CS1644: Feature `out variable declaration' cannot be used because it is not part of the C# 4.0 language specification
49. Library/PackageCache/com.unity.textmeshpro@2.0.0/Scripts/Runtime/TMP_Text.cs(3114,80): error CS1644: Feature `out variable declaration' cannot be used because it is not part of the C# 4.0 language specification
50. Library/PackageCache/com.unity.textmeshpro@2.0.0/Scripts/Runtime/TMP_Text.cs(3812,73): error CS1644: Feature `out variable declaration' cannot be used because it is not part of the C# 4.0 language specification
51. Library/PackageCache/com.unity.textmeshpro@2.0.0/Scripts/Runtime/TMP_Text.cs(3945,130): error CS1644: Feature `out variable declaration' cannot be used because it is not part of the C# 4.0 language specification
52. Library/PackageCache/com.unity.textmeshpro@2.0.0/Scripts/Runtime/TMP_Text.cs(3958,130): error CS1644: Feature `out variable declaration' cannot be used because it is not part of the C# 4.0 language specification
53. Library/PackageCache/com.unity.textmeshpro@2.0.0/Scripts/Runtime/TMP_Text.cs(5446,177): error CS1644: Feature `out variable declaration' cannot be used because it is not part of the C# 4.0 language specification
54. Library/PackageCache/com.unity.textmeshpro@2.0.0/Scripts/Runtime/TMP_Text.cs(5446,214): error CS1644: Feature `out variable declaration' cannot be used because it is not part of the C# 4.0 language specification
55. Library/PackageCache/com.unity.textmeshpro@2.0.0/Scripts/Runtime/TMP_Text.cs(5458,179): error CS1644: Feature `out variable declaration' cannot be used because it is not part of the C# 4.0 language specification
56. Library/PackageCache/com.unity.textmeshpro@2.0.0/Scripts/Runtime/TMP_Text.cs(5458,216): error CS1644: Feature `out variable declaration' cannot be used because it is not part of the C# 4.0 language specification
57. Library/PackageCache/com.unity.textmeshpro@2.0.0/Scripts/Runtime/TMP_Text.cs(5919,66): error CS1644: Feature `out variable declaration' cannot be used because it is not part of the C# 4.0 language specification
58. Library/PackageCache/com.unity.textmeshpro@2.0.0/Scripts/Runtime/TMP_TextUtilities.cs(2039,100): error CS1644: Feature `out variable declaration' cannot be used because it is not part of the C# 4.0 language specification
59. Library/PackageCache/com.unity.textmeshpro@2.0.0/Scripts/Runtime/TMPro_Private.cs(1019,59): error CS1644: Feature `out variable declaration' cannot be used because it is not part of the C# 4.0 language specification
60. Library/PackageCache/com.unity.textmeshpro@2.0.0/Scripts/Runtime/TMPro_Private.cs(1751,73): error CS1644: Feature `out variable declaration' cannot be used because it is not part of the C# 4.0 language specification
61. Library/PackageCache/com.unity.textmeshpro@2.0.0/Scripts/Runtime/TMPro_Private.cs(1903,130): error CS1644: Feature `out variable declaration' cannot be used because it is not part of the C# 4.0 language specification
62. Library/PackageCache/com.unity.textmeshpro@2.0.0/Scripts/Runtime/TMPro_Private.cs(1916,130): error CS1644: Feature `out variable declaration' cannot be used because it is not part of the C# 4.0 language specification
63. Library/PackageCache/com.unity.textmeshpro@2.0.0/Scripts/Runtime/TMPro_UGUI_Private.cs(1089,59): error CS1644: Feature `out variable declaration' cannot be used because it is not part of the C# 4.0 language specification
64. Library/PackageCache/com.unity.textmeshpro@2.0.0/Scripts/Runtime/TMPro_UGUI_Private.cs(1865,73): error CS1644: Feature `out variable declaration' cannot be used because it is not part of the C# 4.0 language specification
65. Library/PackageCache/com.unity.textmeshpro@2.0.0/Scripts/Runtime/TMPro_UGUI_Private.cs(2028,130): error CS1644: Feature `out variable declaration' cannot be used because it is not part of the C# 4.0 language specification
66. Library/PackageCache/com.unity.textmeshpro@2.0.0/Scripts/Runtime/TMPro_UGUI_Private.cs(2041,130): error CS1644: Feature `out variable declaration' cannot be used because it is not part of the C# 4.0 language specification
67.  

Spoiler: Screenshot

Lucky for me, I don't use TextMesh Pro in this project, so I was able to simply remove the package and the error vanished.

 

I've had some issues with TMP not handling updates very well - it seems like it's not getting recompiled properly after upgrading the Unity version. Deleting it's folder in Library/PackageCache has fixed the issue. Just selecting it and reimporting hasn't.

 

I tried that, didn't fix the issue here.

 

Same issue, Did you figure anything out?

 

Nope. QA replied with "Change Scripting Runtime Version to .NET 4.x" and closed the issue. Not sure if that's the proper solution though, since this issue did not exist in 2019.1.0b4. Something did change between b4 and b9 which now causes this issue.

However, I did what I could do to make Unity aware that there seems to be an issue. If they believe the solution is to switch to .NET 4.x, then fine ¯\_(ツ)_/¯

 

How does one "Change ScriptingBackend to .NET 4.x"?

 

Edit > Project Settings > Player > Other Settings > Scripting Runtime Version

Update: Unity Technologies created a Sticky Note regarding this issue:
https://forum.unity.com/threads/tex...-1-requires-net-4-x-scripting-runtime.662851/

 

This solved the issue for me Thank you !

 

Edit > Project Settings > Player > Other Settings > Scripting Runtime Version

that fixed it for me in 2019.1 full release. It was set to 3.5(depreciated). You'd think with just 2 settings (and 1 of them not being good), unity would have just changed it for you. Oh well.

 

Can confirm, Peter77's solution worked for me too

 

I upgraded from the 2017 version to the 2019 release, can also confirm that Peter77's solution worked for me too.
Thanks for also posting how to change the Scripting Runtime Version

 

This was an issue for me too, and about had me going crazy, until I found this thread, so just wanted to say this worked for me too. Changed to 4.x and all 72 errors went away and the project runs just fine!

 

Confirmed again, just migrated a project from Unity2017 and TMPro 1.x to 2019.1 and TMPro version. all compile error messages gone, have a ton of null pointer reference exceptions, but that may be due to editor values not being carried over

 

You sir, saved my life.

 

Thanks SO much Peter77! I'm been trying to figure out how to fix this for the longest time — the solution ended up being incredibly simple!

 

Switching to .NET 4.x fixes the TextMesh Pro error, but induces errors in other packages I'm using. I wish there was a solution that doesn't require upgrading to .NET 4.x. For now, I have to regularly go back into the
Library/PackageCache/ and delete com.unity.textmeshpro@2.0.0 to get my code working again...

 

It works for me as well. In the package manager, TextMeshPro requires .NET 4.x now. Thanks, dude!