Error with value....

namespace inAnorak.Win.ExtForms.Classes {

[poExtension("Hercules.*", "Hercules", "CompositionEntries", poExtensionKind.PresenterMethod, "{4E9E8C7B-7AC5-49FF-834A-8092AE92567F}")]

public class inAnorakCompositionEntriesP : poExtensionPresenter, IpoAppContextInit {

    private IpoAppContext _AppContext;

    public inAnorakCompositionEntriesP(IpoAppContext appContext) {
        if (appContext == null) {
            MessageBox.Show("The app context is null. Please ensure it is properly initialized.",
                            "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
            throw new InvalidOperationException("IpoAppContext is not initialized.");
        }

        _AppContext = appContext;
        MessageBox.Show("inAnorakCompositionEntriesP initialized successfully.",
                        "Success", MessageBoxButtons.OK, MessageBoxIcon.Information);
    }

public bool GenerateFileFromCustomReport(ref poActionLogger log, heDocEntriesDataObject entry, string reportid, string exportfolder, string filetype) {
    bool bRes = false;

    try {
        IpoCustomReport repService = _AppContext.GetService<IpoCustomReport>();
        poCustomReportInfo report = repService.Get(reportid);
        poDataCollector dataCollector = poCustomDataCollector.CreateFromCustomReport(_AppContext, report);
        poDataCollectorStorage storage = poDataCollectorStorage.CreateFromDataCollector(dataCollector);
        dataCollector.SetFilterValue(storage, "@$Parameter$", "@$Parameter01$", poFilterItemWhereKindEnum.Equal, entry.ID);
        dataCollector.ApplyStorage(storage);
        poDataCollectorResult result = dataCollector.GetData();

        /* #02 = xlsx
           #05 = html
           #06 = pdf
           #07 = xps */

        switch (filetype) {
            case "xlsx": filetype = "#02"; break;
            case "html": filetype = "#05"; break;
            case "pdf": filetype = "#06"; break;
            case "xps": filetype = "#07"; break;
        }

        poFormArgs args = new poFormArgs();
        args.InArgs["Data"] = result.Data;
        args.InArgs["Report"] = report;
        args.InArgs["ViewName"] = "(Default)";
        args.InArgs["PrintDocType"] = new poPrintDocTypes() { PrintType = filetype };
        args.InArgs["FileName"] = exportfolder + entry.DocCode;
        args.InArgs["Execute"] = true;

        poAsyncResult res1 = _AppContext.CallObjectProxyMethod<poAsyncResult>("Poseidon", "DataCollectorReport", "CustomReport.ReportInvoke", report.ID, storage, null, poReportEngines.ReportEnginesEnum.FastReports);
        args.InArgs["Report.frx"] = res1.NamedArgs["Report.frx"];
        object res2 = _AppContext.GetService<IpoActionsFactory>().Invoke("Poseidon", "PrintDoc.ExecuteSilent", args, null);
        Tuple<List<string>, poPrintFiscalData, poActionLogger> res3 = res2 as Tuple<List<string>, poPrintFiscalData, poActionLogger>;
        if ((res3.Item1.Count == 0) && (res3.Item3.Count > 0)) {
            foreach (poActionLoggerItem err in res3.Item3)
                log.Add(err);
        } else
            bRes = true;
    } catch (Exception exp) {
        log.AddFromException(exp, "Error generating report " + entry.GetSignature());
        bRes = false;
    }

    return bRes;
}

Value cannot be null. Parameter name: con

at System.Reflection.Emit.DynamicILGenerator.Emit(OpCode opcode, ConstructorInfo con)
   at Poseidon.Libs.Base.poSys.Create(Type t, IpoAppContext appContext, Func1 create)
   at Poseidon.Libs.Base.poSys.Create[T](String assemblyName, String className, IpoAppContext appContext)
   at Poseidon.Libs.Base.Extensibility.poExtensionsManager.CreateItem[T](IpoAppContext appContext, poExtensionItem item)
   at Poseidon.Libs.Base.Extensibility.poExtensionsManager.GetList[T](String domainKey, String domain, String name, String kind, IpoAppContext appContext)
   at Poseidon.Libs.UI.Presenters.poPresenter.<Init>b__5_0()
   at Poseidon.Libs.Base.poSys.ExtensionCall(Action method)
   at Poseidon.Libs.UI.Presenters.poPresenter.Init()
   at Poseidon.Libs.UI.Presenters.poPresenterMaster1.Init()
   at Hercules.Win.INF.Entries.heDocEntriesPresenter.Init()
   at Poseidon.Libs.Base.poObject.Poseidon.Libs.Base.Interfaces.IpoAppContextInit.Init(IpoAppContext appContext)
   at Poseidon.Libs.Base.poSys.Create(Type t, IpoAppContext appContext, Func1 create)
   at Poseidon.Libs.UI.Helpers.poFormsFactory.CreateProperty(IpoForm form, PropertyInfo prop)
   at Poseidon.Libs.UI.Helpers.poFormsFactory.CreateForm(Type t, poFormArgs args)
   at Poseidon.Libs.UI.Helpers.poFormsFactory.Create(Type t, poFormArgs args)
   at Poseidon.Libs.UI.Schema.poActionForm.FormCreate(poFormArgs args)
   at Poseidon.Libs.UI.Schema.poActionForm.InvokeCore(Object[] args)
   at Poseidon.Libs.Base.Schema.poAction.Invoke(Object[] args)
   at Poseidon.Libs.Base.Schema.poActionsFactory.Invoke(String domain, String name, Object[] args)
   at Poseidon.Win.Explorer.poMainF.<>c__DisplayClass152_0.<RunAction>b__1(Object state)

private IpoAppContext _AppContext;

public inAnorakCompositionEntriesP(IpoAppContext appContext) {
    if (appContext == null) {
        MessageBox.Show("The app context is null. Please ensure it is properly initialized.",
                        "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
        throw new InvalidOperationException("IpoAppContext is not initialized.");
    }

    _AppContext = appContext;
    MessageBox.Show("inAnorakCompositionEntriesP initialized successfully.",
                    "Success", MessageBoxButtons.OK, MessageBoxIcon.Information);
}