Color triggers version error when calling ACadSharp from Inventor 2023

[JorenPelfrene]

Hi,
Whenever I use colors and write a new .dwg file with ACadSharp from Inventor 2023 (compatible with .NET Framework 4.8) I get below version error. At the moment I don't know how to resolve it. Perhaps you can advise?

System.IO.FileNotFoundException: Could not load file or assembly 'System.Memory, Version=4.0.1.2, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51' or one of its dependencies. The system cannot find the file specified.
File name: 'System.Memory, Version=4.0.1.2, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51'
at ACadSharp.Color.get_B()
at ACadSharp.IO.DWG.DwgStreamWriterAC18.WriteEnColor(Color color, Transparency transparency, Boolean isBookColor)
at ACadSharp.IO.DWG.DwgMergedStreamWriter.WriteEnColor(Color color, Transparency transparency, Boolean isBookColor)
at ACadSharp.IO.DWG.DwgObjectWriter.writeEntityMode(Entity entity)
at ACadSharp.IO.DWG.DwgObjectWriter.writeEntity(Entity entity)
at ACadSharp.IO.DWG.DwgObjectWriter.writeBlockEntities()
at ACadSharp.IO.DWG.DwgObjectWriter.Write()
at ACadSharp.IO.DwgWriter.writeObjects()
at ACadSharp.IO.DwgWriter.Write()
at TestIO.Curve.WriteDWG(String filename)
at ThisRule.Main() in external rule: test_io_simple:line 15
at Autodesk.iLogic.Exec.AppDomExec.ExecRuleInAssembly(Assembly assem)
at iLogic.RuleEvalContainer.ExecRuleEval(String execRule)

WRN: Assembly binding logging is turned OFF.
To enable assembly bind failure logging, set the registry value [HKLM\Software\Microsoft\Fusion!EnableLog] (DWORD) to 1.
Note: There is some performance penalty associated with assembly bind failure logging.
To turn this feature off, remove the registry value [HKLM\Software\Microsoft\Fusion!EnableLog].

As always, greatly appreciating ACadSharp.

Thank you.

[DomCR]

Hi @JorenPelfrene,

ACadSharp has a dependency for System.Memory in Framework 48, you have to make sure that the dll is loaded or in the same folder as ACadSharp.dll.

ACadSharp/src/ACadSharp/ACadSharp.csproj

Line 36 in 4f0723d

<PackageReference Include="System.Memory" Version="4.5.5" />

I'm guessing that you are implementing a plugin for Inventor, if that's so, you need to be sure to copy the System.Memory.dll into the same folder as your plugin dll and ACadSharp.

Hope this helps.

[JorenPelfrene]

That solved it!
Thank you. I was not aware of this yet.