Importing dxfs


hello
when i import dxf into solid works and try to extrude i get aerror message
sketch contains more than one open contour
or may have one or more overlaping open contour.


when i get this message it leaves a blue square at the problemarea this can be edited to resolve the problem which is not aproblem, but when you have multipal errors you have to extrude tofind each one at a time.
ive tried the repair skecth but does not seem to work,is there amore simple fix for these errors


cheers johnSolidworksGeneral