Problem Description:
Some user report that they after finish modeling, they can't generate the 2d view sometimes, or they can create the 2d view but the section hatch is incorrect.
The solution for such kind of problem:
1.Go back to open the part you want to used to create 2d sheet.
2.Change the Tolerance value to bigger (The default value is 0.01, try to change 0.02 or 0.05)
