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Problem: Unable to edit endpoint vertices in a Schematics diagram

Description

When editing a schematic diagram, the interior points of the schematic are editable, but the end points are unable to be moved.

Cause

The schematic has been created from a line feature class that has not been connected to a node layer in the schematic dataset.

Solution or Workaround

While it is possible to create a schematic diagram from lines, it is not recommended because Schematics is designed to work with links and nodes. If using a diagram with nodes (junctions) for each link end, move the nodes using the Move Schematic Features tool, as the links follow. The vertices in the links can then be edited using the Move Vertex tool.