OpenXML Export does not work: Data.OpenXMLExportExcel operation failed. Common Language Runtime detected an invalid program

[c.poupin]

Hi,

It’s probably a library conflict with another add-in or Dynamo package.

Try disabling the add-ins and retesting. If it fails again, try removing the Dynamo packages.

Another workaround is to use Python with the OpenPyXL library.

Dynamo Version 3 Excel Export

Unfortunately, only Excel Interop allows this. A workaround is to display the xlsx data in a third-party window (such as WPF, Winform, HTML). try this version with python and pandas [image] import clr import sys import System import os import sysconfig # standard library path sys.path.append(sysconfig.get_path("platstdlib")) # site-package library path sys.path.append(sysconfig.get_path("platlib")) import pandas as pd from openpyxl.worksheet.table import Table, TableStyleInfo from openpyxl…