IP-S7-Link .Net Advanced COM Frequently Asked Questions (FAQs)

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Excel does not longer recognize an imported type or method.

Through uninstalling and re-installing a Excel imported library this may affect the library registration so Excel may not longer be able to resolve some type and method information contained in the library.


  • Open the references dialog.
  • Lookup the imported library its type or method was highlighted by Excel.
  • Remove the reference to the library from your Excel workbook.
  • Commit the removement using OK.
  • Save the Excel workbook changes (this is important).
  • Then re-open the references dialog.
  • Select the previously removed library.
  • Commit this step using OK.
  • Save the Excel workbook changes.
  • Now everything should work again as expected.