30007: Vertical lines not supported in a 9.3.1 file geodatabase
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Vertical line segments are not supported in an ArcGIS 9.3.1 file geodatabase. Vertical line segments are supported in ArcGIS 10 and later.
Do nothing. Be aware that the package created is only supported on ArcGIS version 10 and later. Youcannot unpack this package in version 9.3.1.
Packages with data that contains vertical line segments are not supported in ArcGIS 9.3.1 because vertical line segments are not supported in 9.3.1.