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Question by unity_3qWoBwFE4vOT3Q · Sep 25, 2017 at 03:07 PM · build-errormonoexe

System.InvalidOperationException when opening project in Unity 2017

When I open my project in Unity3D (2017.1.1f1 64 bit) I'm getting the following error (twice):

System.InvalidOperationException: Operation is not valid due to the current state of the object. at Mono.Cecil.ModuleDefinition.ProcessDebugHeader () [0x00021] in :0
at Mono.Cecil.ModuleDefinition.ReadSymbols (Mono.Cecil.Cil.ISymbolReader reader) [0x00015] in :0
at Mono.Cecil.ModuleReader.ReadSymbols (Mono.Cecil.ModuleDefinition module, Mono.Cecil.ReaderParameters parameters) [0x00047] in :0
at Mono.Cecil.ModuleReader.CreateModuleFrom (Mono.Cecil.PE.Image image, Mono.Cecil.ReaderParameters parameters) [0x0007b] in :0
at Mono.Cecil.ModuleDefinition.ReadModule (System.IO.Stream stream, Mono.Cecil.ReaderParameters parameters) [0x00028] in :0
at Mono.Cecil.AssemblyDefinition.ReadAssembly (System.IO.Stream stream, Mono.Cecil.ReaderParameters parameters) [0x00000] in :0
at AssemblyUpdater.Core.AssemblyUpdaterContext.ReadAssembly (System.String assemblyPath, APIUpdater.Framework.Log.IAPIUpdaterListener listener, System.IO.FileAccess mode, System.String[] searchPaths) [0x0007c] in :0 > at > AssemblyUpdater.Core.AssemblyUpdaterContext.From > (System.String assemblyPath, > APIUpdater.Framework.Configuration.IConfigurationProvider > configuration, System.String[] > assemblySearchPaths, > AssemblyUpdater.Core.UpdaterMode mode, > APIUpdater.Framework.Log.IAPIUpdaterListener > listener) [0x0002b] in > :0 > at > AssemblyUpdater.Core.AssemblyUpdaterContext.From > (System.String assemblyPath, > System.String[] assemblySearchPaths, > AssemblyUpdater.Core.UpdaterMode mode, > APIUpdater.Framework.Log.IAPIUpdaterListener > listener) [0x00001] in > :0 > at > AssemblyUpdater.Application.Program.CheckForObsoleteAPIUsage > (AssemblyUpdater.Application.CommandLineSpec > config) [0x00013] in > :0 > at > AssemblyUpdater.Application.Program.Main > (System.String[] args) [0x00057] in > :0 > UnityEditor.Scripting.APIUpdaterHelper:DoesAssemblyRequireUpgrade(String)

I'm lost because I haven't been able to find any references to this on the internet, and it just started appearing recently (and when I try to go back to the way the project was before the changes, the errors don't disapppear.

I've also fully uninstalled unity3d (including appdata and registry keys), but the error doesn't disappear.

I've enabled experimental 4.6 compatibility, and my dlls are built to target 4.6 (error also appears on 4.5.2)

What could be the cause of this issue?

Thank you for any help.

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Answer by Cuttlas-U · Sep 25, 2017 at 05:57 PM

hi; i think a problem happened during updating your project for unity 2017 ; this way it wont work on other versions of unity too ;

switch to last back up of your project;

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avatar image unity_3qWoBwFE4vOT3Q · Sep 26, 2017 at 01:35 PM 0
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This project was started in 2017, and so there was no upgrade.

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