The feature's geometry could not be modified, invalid geometry.

Error Message

Note:
This article pertains to ArcGIS versions 8.x, 9.x , and 10.0 only. Later versions of ArcGIS may contain different functionality, as well as different names and locations for menus, commands and geoprocessing tools.

After doing a Flip and Trim sequence on an edge feature with a detached junction on at least one end, finishing the Edit Sketch produces this error:

Error:
The feature's geometry could not be modified, invalid geometry

Cause

When doing a Flip and Trim sequence on an edge feature with standard junctions at both ends, and then finishing the Edit Sketch session, features connected to the end points remain connected to the flipped ends. This results in incorrect connectivity.

Solution or Workaround

Perform the Flip and Trim commands in two separate Edit Sketch sessions.