Originally Posted by
mmccall.83699
The structures need to have a reference alignment set . Go to the properties of the structure to set it.
When creating a pipe network one of the things that need to be set is an alignment to reference. This alignment name gets passed on to the structures. You can, and will need to, change this network alignment as you branch off to other alignments. Changing it will only affect the new structures as they'll inherit the alignment set in the network properties at the time they were created.