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I created multiple objects in Blender 2.8 using the Bezier curves and converted them to Mesh using the Object->Convert To->Mesh from Curve.

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Now for whatever reason when I select all of the objects in object mode and do "Ctrl+J" to join them, 5 of the objects disappear and I'm left with only one.

enter image description here

I tried to replicate this again, but it's working fine for all of the other objects I try to join, it only acts like this for these 6 specific objects. I tried to select them and export them and then re-import, but for some reason blender is exporting only 80bytes for the STL, not sure if it's related or not.

When I go into the edit mode, I can see that they're all "Mesh" instead of "Curve" why is it acting like this? I never have faced this issue before, maybe I enabled some kind of 'property' for the object that causes this? Thanks!

Here is the Blend file:

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  • $\begingroup$ Sound confusing, can you upload the file with those 6 objects to blend-exchange.giantcowfilms.com? $\endgroup$ – Leander Aug 13 at 13:55
  • $\begingroup$ @Leander I uploaded and updated my post, thank you very much! $\endgroup$ – Kristian Aug 13 at 14:00
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This looks like a bug. But you can use a helper object, to merge these objects.

  1. Add a Curve Object. ⇧ ShiftA > Curve > Bezier
  2. Go into edit mode ↹ Tab and delete X the selected control points leaving you with an empty bezier. Exit edit mode ↹ Tab.
  3. Select all other objects with the border selection B. [Make sure, that the newly created (empty) bezier object stays the active object.]
  4. Merge them with ⎈ CtrlJ.
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    $\begingroup$ Thank you so much, that worked perfectly!! $\endgroup$ – Kristian Aug 13 at 14:14

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