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In the process of drawing CAD drawings using Haochen CAD software, it is often necessary to use the CAD filling function. When we are performing CAD pattern filling, we find that the pattern cannot be filled and the existing boundaries are repeated. How to solve the problem? Next, I will give you a detailed introduction to the solution to the problem that the CAD filling process prompts that it cannot be filled and the existing boundaries are repeated! CAD pattern fill prompt cannot be filled solution: When the pattern cannot be filled during the CAD drawing process, you can use the following three methods to solve the problem.: 1. When the pattern is not completely closed and filled, use the PL line to draw a filling boundary. 2. Achieve this through the command FILL or the system variable FILLMODE. 3. Use layers to achieve it. CAD pattern fill shows existing boundary duplication solution: If it shows that there is already a repeated border, it means that you have selected the area to be filled and cannot repeat it (picking point). At this time, just turn off object snapping, use the PL line to draw a circle around the area that needs to be filled, and then use the H pick box to fill it. Adjust the proportion to see the filling effect you want, and you can solve the problem of displaying repeated borders. Skill: To hide the bounding object of a hatch, assign the bounding object to a different layer than the hatch object, and then turn off or freeze the bounding object's layer. This technique keeps the hatch relevant. The above is the solution to the problem that Haochen CAD software prompts that the existing boundaries cannot be filled and displayed during the CAD filling process. Friends who encounter such problems can refer to this CAD tutorial to solve it.