Problem: Unable to load file or Assembly. Unsupported operation. (HRESULT exception: 0x80131515)

Question

Good night,

I have developed a program and need to implement PDF printing functionality.

Doing research on the Internet I found what I need, but there’s a problem. When I run the code in a separate console program, it opens the window of the option to choose the printer and then prints. I implemented this code in my project, but is presenting the following error:

Error 1 Could not load file or Assembly 'file://C: Job Projects NET CORREIOS Ctzemisetiqcorreios Ctzemisetiqcorreios bin Debug Spire.License.dll' or one of its dependencies. Operation without support. (HRESULT exception: 0x80131515) C: Work Projects NET POST OFFICE Ctzemisetiqcorreios Ctzemisetiqcorreios SGEN Ctzemisetiqcorreios

I’m using external dll:

using Spire.Pdf; using Spire.pdf.Annotations; using Spire.pdf.Widget;

These libraries are attached inside the debug folder and in the project release folder, but have not solved.

The method is as follows::

  // Bibliotecas externas
  using Spire.Pdf;
  using Spire.Pdf.Annotations;
  using Spire.Pdf.Widget;

  private void PrintPdf(string pstrNomeArqTxt)  
  {
        PdfDocument doc = new PdfDocument();  

        //Set the printer and select the pages you want to print
        PrintDialog dialogPrint = new PrintDialog();
        dialogPrint.AllowPrintToFile = true;
        dialogPrint.AllowSomePages = true;
        dialogPrint.PrinterSettings.MinimumPage = 1;
        dialogPrint.PrinterSettings.MaximumPage = doc.Pages.Count;
        dialogPrint.PrinterSettings.FromPage = 1;
        dialogPrint.PrinterSettings.ToPage = doc.Pages.Count;

        if (dialogPrint.ShowDialog() == DialogResult.OK)
        {
            //Set the pagenumber which you choose as the start page to print
            doc.PrintFromPage = dialogPrint.PrinterSettings.FromPage;

            //Set the pagenumber which you choose as the final page to print
            doc.PrintToPage = dialogPrint.PrinterSettings.ToPage;

            //Set the name of the printer which is to print the PDF
            doc.PrinterName = dialogPrint.PrinterSettings.PrinterName;

            PrintDocument printDoc = doc.PrintDocument;
            dialogPrint.Document = printDoc;
            printDoc.Print();
        }
    }

Does anyone know what is causing the mistake ?

Thank you