The instructions provided describe to create a Python toolbox and store it as a system toolbox in ArcGIS Pro, easily accessible for any project through the Geoprocessing pane, and intended for all users.
Adding an .xls file to ArcMap returns a general function error. The error is returned due to having installed a recent Microsoft update for Windows 10 or Windows 7.
Have you ever attempted to run a geoprocessing tool, only to have the tool fail? Perhaps your data fails to publish or draws incorrectly on your map? You may be dealing with a data-specific issue.
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