# Need some little help here

**URL:** <https://discourse.mcneel.com/t/need-some-little-help-here/21032>\
**Category:** Rhino for Windows\
**Created:** [May 29, 2015, 12:21pm UTC](https://discourse.mcneel.com/t/need-some-little-help-here/21032 "2015-05-29T12:21:14Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![BulgaruA](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/bulgarua/32/47018_2.png) [@BulgaruA](https://discourse.mcneel.com/u/BulgaruA)\
**Post date:** [May 29, 2015, 12:21pm UTC](https://discourse.mcneel.com/t/need-some-little-help-here/21032/1 "2015-05-29T12:21:14Z")

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Hello,

I’m trying to close these surfaces to a polysurface but it doesn’t work and I don’t know why. Can you have a look over it? What is the problme there? [help.3dm](https://global.discourse-cdn.com/mcneel/uploads/default/original/4/7/47be28dff351a5904440a0205a6d46340f798d72.3dm) (224.7 KB)

Thanks!

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**Author:** ![clement](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/clement/32/759176_2.png) [@clement](https://discourse.mcneel.com/u/clement)\
**Post date:** [May 29, 2015, 12:53pm UTC](https://discourse.mcneel.com/t/need-some-little-help-here/21032/2 "2015-05-29T12:53:32Z")

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Hi Alex,

there are some bad objects in this polysurface. To make Rhino detect them automatically you might enable `_CheckNewObjects`. This will pop up a dialog every time a bad object is created.

To repair it, you can extract the bad surfaces and inspect their trim curves (`_Untrim _KeepTrimObjects=_Yes` then `_Explode` the trim curves). There are some tiny segments which made the trims bad…too time consuming to repair them all so i`ve just extracted the important ellipses and made some new lofted surfaces. I guess the source of the problems is a loft surface of the inner shell which should be a single surface but has fallen apart into 4 surfaces. This can be avoided if your loft curve (the trim of the bulged cap) is continous, without having kinks in them.

[help.3dm](https://global.discourse-cdn.com/mcneel/uploads/default/original/7/b/7b2c04b0f76eba73e3dd0d4b461da0b2949a5b2d.3dm) (125.2 KB)

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c.