Could not create the collection of boundary elements (Structural Detailing)
Meaning: Failed to create a collection to hold information while processing an object. Therefore, the utility could not properly finish. This error is probably a computer memory problem.
Recovery: Restart the command, restart with a fresh session, or reboot the computer to release any hidden memory. Verify that all inputs are good and are not on the To Do List. Make any necessary corrections. If problem still exists, report steps taken to your support group.