>> There should be listed the faulty app or interface.
The App is the Style Library Manager.
I can see from the message text a reference to a method call at:
Autodesk.AutodeskInventor.StyleManager.StyleLibrary.DetermineDifferences(String& styleCollectionInternalName, StyleLibrary& firstStyleLibrary, StyleLibrary& secondStyleLibrary)
So, you see the failure happened at the attempt to call the method call DetermineDifferences(), but that could not happen because one of the object references yielded the classic "Object reference not set to an instance of an object." error.
Anyway, here is the entire contents of the text in the error message, but I don't think it adds anything helpful, as all it shows is "Loaded Assemblies" which is just a list of .Net assemblies that are active in the call stack or something. I see some technical instructions about a .config and JIT debugging... I'm a little bit familiar with .Net debugging from my work in .Net and C#, and I also have Visual Studio 2017 installed on my machine, so I created a "Style Library Manager.exe.config" in the same folder as "Style Manager Library.exe.", and added the required xml code to it, then I re-ran the app but it still only give me the standard catch-all error handler that I showed you so far. I can dig deeper, but will need some some instructions from your developer folks to get that low level.
I even attached the Visual Studio debugger directly to the process which was running the app and it still does not pick up the stack trace.
See the end of this message for details on invoking
just-in-time (JIT) debugging instead of this dialog box.
************** Exception Text **************
System.NullReferenceException: Object reference not set to an instance of an object.
at Autodesk.AutodeskInventor.StyleManager.StyleLibrary.DetermineDifferences(String& styleCollectionInternalName, StyleLibrary& firstStyleLibrary, StyleLibrary& secondStyleLibrary)
at StyleLibraryManager.StyleLibraryManager.set_SelectedStyleCollection(StyleCollection Value)
at StyleLibraryManager.StyleLibraryManager.StyleCollectionListView_SelectedIndexChanged(Object sender, EventArgs e)
at System.Windows.Forms.ListView.OnSelectedIndexChanged(EventArgs e)
at System.Windows.Forms.ListView.WmReflectNotify(Message& m)
at System.Windows.Forms.ListView.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
************** Loaded Assemblies **************
mscorlib
Assembly Version: 4.0.0.0
Win32 Version: 4.7.2115.0 built by: NET47REL1LAST
CodeBase: file:///C:/Windows/Microsoft.NET/Framework64/v4.0.30319/mscorlib.dll
----------------------------------------
Style Library Manager
Assembly Version: 22.20.22700.0
Win32 Version: 22.20.22700.0
CodeBase: file:///C:/Program%20Files/Autodesk/Inventor%202018/Bin/Style%20Library%20Manager.exe
----------------------------------------
System.Windows.Forms
Assembly Version: 4.0.0.0
Win32 Version: 4.7.2110.0 built by: NET47REL1LAST
CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/System.Windows.Forms/v4.0_4.0.0.0__b77a5c561934e089/System.Windows.Forms.dll
----------------------------------------
System
Assembly Version: 4.0.0.0
Win32 Version: 4.7.2110.0 built by: NET47REL1LAST
CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/System/v4.0_4.0.0.0__b77a5c561934e089/System.dll
----------------------------------------
System.Drawing
Assembly Version: 4.0.0.0
Win32 Version: 4.7.2046.0 built by: NET47REL1
CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/System.Drawing/v4.0_4.0.0.0__b03f5f7f11d50a3a/System.Drawing.dll
----------------------------------------
Microsoft.VisualBasic
Assembly Version: 10.0.0.0
Win32 Version: 14.7.2046.0 built by: NET47REL1
CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/Microsoft.VisualBasic/v4.0_10.0.0.0__b03f5f7f11d50a3a/Microsoft.VisualBasic.dll
----------------------------------------
System.Core
Assembly Version: 4.0.0.0
Win32 Version: 4.7.2117.0 built by: NET47REL1LAST
CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/System.Core/v4.0_4.0.0.0__b77a5c561934e089/System.Core.dll
----------------------------------------
StyleManager
Assembly Version: 22.20.22700.0
Win32 Version: 22.20.22700.0
CodeBase: file:///C:/Program%20Files/Autodesk/Inventor%202018/Bin/StyleManager.DLL
----------------------------------------
Autodesk.Inventor.Interop
Assembly Version: 22.2.0.0
Win32 Version: 22.2.0.0
CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/Autodesk.Inventor.Interop/v4.0_22.2.0.0__d84147f8b4276564/Autodesk.Inventor.Interop.dll
----------------------------------------
System.Configuration
Assembly Version: 4.0.0.0
Win32 Version: 4.7.2046.0 built by: NET47REL1
CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/System.Configuration/v4.0_4.0.0.0__b03f5f7f11d50a3a/System.Configuration.dll
----------------------------------------
System.Xml
Assembly Version: 4.0.0.0
Win32 Version: 4.7.2102.0 built by: NET47REL1LAST
CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/System.Xml/v4.0_4.0.0.0__b77a5c561934e089/System.Xml.dll
----------------------------------------
IPJPROJECTLISTLib
Assembly Version: 22.20.22700.0
Win32 Version: 22.20.22700.0
CodeBase: file:///C:/Program%20Files/Autodesk/Inventor%202018/Bin/IPJPROJECTLISTLib.DLL
----------------------------------------
IPJPROJECTTREELib
Assembly Version: 22.20.22700.0
Win32 Version: 22.20.22700.0
CodeBase: file:///C:/Program%20Files/Autodesk/Inventor%202018/Bin/IPJPROJECTTREELib.DLL
----------------------------------------
************** JIT Debugging **************
To enable just-in-time (JIT) debugging, the .config file for this
application or computer (machine.config) must have the
jitDebugging value set in the system.windows.forms section.
The application must also be compiled with debugging
enabled.
For example:
<configuration>
<system.windows.forms jitDebugging="true" />
</configuration>
When JIT debugging is enabled, any unhandled exception
will be sent to the JIT debugger registered on the computer
rather than be handled by this dialog box.