isDerivedFrom gives a linker error in CLR projects with latest Visual Studio

ow — Mon, 20 Jan 2025 07:37:59 GMT

Does anyone have a solution for this?

I get this linker error:

metadata inconsistent with COFF symbol table: symbol '?isDerivedFrom@AcRxClass@@$$FSA_NPEBV1@0@Z' (0A00006F) mapped to '<unknown symbol>' (06000032) in mgPoly.obj

With the latest versions of Visual Studio 2022 using ObjectARX 2025.

To replicate:

Open the polysamp project, and edit mgPoly.cpp to include isDerivedFrom somewhere:

////////////////////////////////////////////////////////////////////////// // constructor Autodesk::ObjectDbxSample::Poly::Poly() :Autodesk::AutoCAD::DatabaseServices::Curve(System::IntPtr(new AsdkPoly()), true) { acutPrintf(_T("\n*********************Constructor")); if (GetImpObj()->isA()->isDerivedFrom(AcDbCurve::desc())) { acutPrintf(_T("\nDerived from AcDbCurve")); } }

A rollback to Visual studio version 17.8 fixes the problem.

Re: isDerivedFrom gives a linker error in CLR projects with latest Visual Studio

ow — Mon, 20 Jan 2025 07:50:17 GMT

I found this work around by @moogalm :

https://developercommunity.visualstudio.com/t/After-a-VS2022-update-I-got-LNK2032:-The/10796640

topic Re: isDerivedFrom gives a linker error in CLR projects with latest Visual Studio in ObjectARX Forum

isDerivedFrom gives a linker error in CLR projects with latest Visual Studio

Re: isDerivedFrom gives a linker error in CLR projects with latest Visual Studio