Known Issues in Autodesk Drainage Analysis for Civil 3D 2026.1

This document lists known issues in Autodesk Drainage Analysis for Civil 3D 2026.1.

General
A pipe cannot be connected during layout. To connect a pipe, create the pipe first and then use the grips to connect it to the stormwater control.
A pipe can be simultaneously connected to a pipe network structure, pond, and underground storage.
Pipe network structures cannot be connected to stormwater controls.
Only certain default values can be configured in the stormwater control command and feature settings.
The stretch and offset commands are not supported for stormwater controls.

Channel
There will be bowties at corners when longitudinal lines are turned on in the channel style.
When using the "Pick from Drawing" option to specify a station range, the temporary graphics have different styles depending on whether the baseline is an alignment/profile or a feature line.
Specifying a baseline station range does not support station formatting according to the channel feature settings.
Channel baseline station range does not support station equations.

Pond
The CreatePondFromSurface command may produce unexpected results for a surface containing holes.
Surface-based ponds do not maintain a link to the original surface they were created from.
The QuickEditPond and DeletePondContour commands may behave unexpectedly if pond contours are not visible.
The intersection object snap does not work with interior contours.
The deferred tangent object snap is currently not supported.
Rollover tooltips cannot be customized.