To successfully migrate pipe network data between the Storm Sewers Extension and the AutoCAD Civil 3D, the pipe network data must meet certain conditions.
Verify that your pipe network data meets these criteria before migrating:
- Note that in the Storm Sewers Extension, a pipe and its corresponding upstream inlet structure make up a Hydraflow Storm Sewers line.
- The Storm Sewers Extension can accept a maximum of 250 pipes (lines) with structures in one project. If a single AutoCAD Civil 3D pipe network contains more than 250 pipes (lines), then the pipe network must be divided into smaller pipe networks (and therefore, multiple .stm files) before the pipe network data can be opened in the Hydraflow Storm Sewers Extension.
- All catch basin and junction structures must have an outlet pipe. To verify this, in AutoCAD Civil 3D display the Connected Pipes tab of the Structure Properties dialog box. Look at the In/Out column.
It is also important to be aware of the following before exporting pipe networks to an .stm file (or any type of export of pipe data):
- If a pipe does not have an upstream structure in AutoCAD Civil 3D, it is given a null structure in the exported file.
- If a structure is not attached to a pipe, the structure will not be exported.