AutoCAD Civil 3D

[#1]

I've been dragging and dropping styles into a new dwt (to start with a clean
dwt), and errors found their way into the new drawing, with the following at
the command line.
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DXF Name Current Value Validation Default
AECC_FEATURELINE_STYLE (SYMBOL_TABLE_RECORD)
eWrongObjectType Standard
AECC_SURFACE_STYLE (SYMBOL_TABLE_RECORD)
eWrongObjectType Standard
AECC_SURFACE_STYLE (SYMBOL_TABLE_RECORD)
eWrongObjectType Standard

3 Blocks audited
Pass 1 0 objects audited
Pass 2 0 objects audited
Pass 3 3200 objects audited
Total errors found 3 fixed 3
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Re-audit find the same errors again. Any ideas how to get rid of the
errors. I tried deleting the standard surface style, but a message read
"cannot delete styles in use". My standard surface style is not in use.
There are no objects in the drawing.

Thanks,

Tyler Townes, P.E.
C3d2006