Determine what type of accuracy (relative or absolute) was used and what the accuracy magnitude is.
This part was created with Pro/E's default accuracy.
Change accuracy from 0.0012 relative to 0.0009 relative.
With finer accuracy the part became corrupt. Finding the problem and solving it would require an experienced Pro/E user.
Change accuracy from 0.0012 relative to 0.001 mm absolute.
Again, with finer accuracy the part became corrupt.