Masks are not correct when creating outline masks for Aeronautical feature classes

Description

** This issue is addressed in ArcGIS 9.1 Service Pack 1 (SP1) **

When trying to create feature outline masks for certain Aeronautical feature classes, masks do not create at all or only a portion of the features get masks.

Cause

This is a known issue.

Workaround

Note:
This issue is addressed in ArcGIS 9.1 Service Pack 1 (SP1).