Are you missing a (for 2021, it is usually 237M1 )?
: Common utility tools often bundled or sought after include the River and Flood Analysis Module , Geotechnical Modeler , and SHP Import/Export Utility for specialized data handling. Core New Features in the 2021 Release Project Explorer Add-On for Autodesk Civil 3D civil3d2021addonkuyhaa7z new