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Good day, dear advanced users of Blender! I am starting to work with Blender and have such occasion. There two objects: -the lighthouse and -the cube. I am trying to create the window in the lighthouse by using Boolean Modifier-> Operation Difference -> Object Cube and immediately I have a message: "Can't execute boolean operation"

The *.blend file is accessible by the link http://wikisend.com/download/612580/lighthouse.bool-error.blend

Please clarify me, how can I create the window due to this operator and why this error appeared?

screen of the error

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  • $\begingroup$ The blend you uploaded works fine though. I just applied the modifier and it did it's job without errors. $\endgroup$ – Cos Dim Feb 5 '17 at 12:15
  • $\begingroup$ Welcome to the site. For uploading files please use blend-exchange (sharing on this site only). Your file had some doubles but they were in the bottom part of the mesh and didn't affect Boolean modifier for me. In general, the error you pointed out means there are some geometry problems with the mesh, see blender.stackexchange.com/questions/34781/…. Also it's recommended to update the Blender version which is 2.78 now from official site. $\endgroup$ – Mr Zak Feb 5 '17 at 13:13
  • $\begingroup$ Thank you Mr Zak! I read the link, that you inserted and found many answers from geometry. $\endgroup$ – Luba_Markovskaya Feb 5 '17 at 14:11
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The problem with the model is it has created double vertices

  1. Go in the edit mode
  2. Press A twice to select all
  3. Press W to bring special key and click remove double
  4. come out of the edit mode and make boolean operation

enter image description here

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  • $\begingroup$ Atek, thank you very much for help! How did you find these double vertices? I want to avoid such situations in the future. $\endgroup$ – Luba_Markovskaya Feb 5 '17 at 13:56
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    $\begingroup$ @atek Put <kbd> tags around keyboard keys please e.g. <kbd>A</kbd> $\endgroup$ – Ray Mairlot Feb 5 '17 at 14:10
  • $\begingroup$ @RayMairlot can you please explain me how to put that? $\endgroup$ – atek Feb 5 '17 at 14:11
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    $\begingroup$ @atek What do you mean? Edit your answer and put <kbd> tags around the letters keyboard keys you are telling them to press, in this case, 'A' and 'W'. $\endgroup$ – Ray Mairlot Feb 5 '17 at 14:13
  • $\begingroup$ @atek Look at my edit. $\endgroup$ – Ray Mairlot Feb 5 '17 at 14:37

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