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Error migrating existing 2.x addin to 3.1.x. Could not load System.Configuration.ConfigurationManager

TimothySmith6

We are in the process of migrating our existing 2.x AddIns to 3.1.x. Several addins have migrated just fine. However we're having a problem upgrading one of them.

I've tried updating it via the Pro Migrate Project tool as well as starting a fresh Addin Project from scratch, and copying files over. Getting the same error when trying to Debug for both.

I have installed System.Configuration.ConfigurationManager via NuGet.

Error apparently being thrown from Module1 Initialize call. The error details points to FrameworkApplication.cs

System.IO.FileNotFoundException
HResult=0x80070002
Message=Could not load file or assembly 'System.Configuration.ConfigurationManager, Version=7.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51'. The system cannot find the file specified.
Source=VersionManagementTools
StackTrace:
at VersionManagementTools.Module1.Initialize() in C:\DevProjects\ArcGISPro\SDKDev_Cloud\ProSDK_VersionManagementTools\SDKAddin\VersionManagementTools\Module1.cs:line 71
at ArcGIS.Desktop.Framework.FrameworkApplication.LoadModule(String id, ModuleRecord record) in ArcGIS.Desktop.Framework\FrameworkApplication.cs:line 5475
at ArcGIS.Desktop.Framework.FrameworkApplication.ProcessModules(Boolean resetModules) in ArcGIS.Desktop.Framework\FrameworkApplication.cs:line 5388
at ArcGIS.Desktop.Framework.FrameworkApplication.ContinueInitializing() in ArcGIS.Desktop.Framework\FrameworkApplication.cs:line 4110
at ArcGIS.Desktop.Framework.FrameworkApplication.OnApplicationReady() in ArcGIS.Desktop.Framework\FrameworkApplication.cs:line 1771
at ArcGIS.Desktop.Framework.FrameworkApplication.<OnStartup>d__161.MoveNext() in ArcGIS.Desktop.Framework\FrameworkApplication.cs:line 1705
at System.Threading.Tasks.Task.<>c.<ThrowAsync>b__128_0(Object state)
at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)
at System.Windows.Threading.DispatcherOperation.InvokeImpl()
at System.Windows.Threading.DispatcherOperation.InvokeInSecurityContext(Object state)
at MS.Internal.CulturePreservingExecutionContext.CallbackWrapper(Object obj)
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)

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Accepted answers

CharlesMacleod

its a visual studio window accessible when u r running the debugger (see below). Sort modules on "Name".

>>Should I try downgrading my nuget package to 6x?

that sounds like it might do the trick

All comments

CharlesMacleod

when I look at the loaded modules for Pro 3.1 on my machine it is using version 6.0.2223 (corresponding to, i assume, the currently supported .NET version for Pro 3x - .NET 6) and not v7.

TimothySmith6

Thanks for the quick reply Charlie.

Where are you looking to see that info.

It does look like I have a 6x and a 7x version of the ConfigMgr dll.

Should I try downgrading my nuget package to 6x?

CharlesMacleod

its a visual studio window accessible when u r running the debugger (see below). Sort modules on "Name".

>>Should I try downgrading my nuget package to 6x?

that sounds like it might do the trick

TimothySmith6

Charlie Macleod you are a Modern Day Hero!

That seemed to fix it. Although I'm still not sure why it was barking at me to begin with, even before I grabbed the wrong version from Nuget.

Thanks so much. Ok, on to the next disaster.....

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