I'm trying to work on something but it keeps throws exceptions on APS
but it works fine on AutoCAD desktop version

let me explain the main idea I have 3 files for example
Site Layout.dwg
villa_1.dwg
villa_2.dwg
open Site Layout.dwg file copy the contents of it to villa_1.dwg and villa_2.dwg
this is a sample code for simplicity

CopyDWGPlugin.cs

public class CopyDWGPlugin
{
    [CommandMethod("COPYDWGDATA")]
    public void CopyDwgData()
    {
        System.Console.WriteLine("PLUGIN LOADED SUCCESSFULLY");
        string workingDir = Directory.GetCurrentDirectory();

        string sourcePath = Path.Combine(workingDir, "input.dwg");
        string targetPath = Path.Combine(workingDir, "output.dwg");

        if (!File.Exists(sourcePath))
            throw new Exception("Source DWG not found: " + sourcePath);

        if (!File.Exists(targetPath))
            throw new Exception("Target DWG not found: " + targetPath);

     
        using (Database sourceDb = new Database(false, true))
        {
            sourceDb.ReadDwgFile(sourcePath, FileShare.Read, true, "");

            
            using (Database targetDb = new Database(false, true))
            {
                
                targetDb.ReadDwgFile(targetPath, FileShare.ReadWrite, true, "");

                ObjectIdCollection ids = new ObjectIdCollection();

                using (Transaction tr = sourceDb.TransactionManager.StartTransaction())
                {
                    BlockTable bt = (BlockTable)tr.GetObject(sourceDb.BlockTableId, OpenMode.ForRead);
                    BlockTableRecord ms =
                        (BlockTableRecord)tr.GetObject(bt[BlockTableRecord.ModelSpace], OpenMode.ForRead);

                    foreach (ObjectId id in ms)
                        ids.Add(id);

                    IdMapping mapping = new IdMapping();

                    sourceDb.WblockCloneObjects(
                        ids,
                        targetDb.CurrentSpaceId,
                        mapping,
                        DuplicateRecordCloning.Replace,
                        false
                    );

                    tr.Commit();
                }

                
                targetDb.SaveAs(targetPath, DwgVersion.Current);
            }
        }

    }
}

PackageContents.xml