PASS/START-PROF automatically verifies piping integrity when opening 3D view or modifying structure. A piping system is considered connected when all nodes are reachable from any starting point. 3D view displays only connected piping systems.
Disconnected elements prevent proper result specification – they may display incorrectly or not at all. To correct, use the element list window to add missing connections.
See also "Working with Disconnected Pipelines".
Deleting intermediate elements splits the structure into disconnected fragments, which is not permitted. In this case, fragment end nodes merge into a single node with the original number.
PASS/START-PROF checks all closed circuits for proper polygon closure. Non-closed polygons split the last input node into two nodes, with one displayed in different color and larger font.
To connect elements to existing nodes (creating closed circuits), specify the existing start or end node number during element creation.
To set node numbering increment, check the checkbox and enter step value.
