# How to remove nearly duplicate curves/lines

**URL:** <https://discourse.mcneel.com/t/how-to-remove-nearly-duplicate-curves-lines/774>\
**Category:** Rhino for Windows\
**Created:** [July 11, 2013, 2:54pm UTC](https://discourse.mcneel.com/t/how-to-remove-nearly-duplicate-curves-lines/774 "2013-07-11T14:54:59Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![tomfinnigan](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/tomfinnigan/32/522027_2.png) [@tomfinnigan](https://discourse.mcneel.com/u/tomfinnigan)\
**Post date:** [July 11, 2013, 2:54pm UTC](https://discourse.mcneel.com/t/how-to-remove-nearly-duplicate-curves-lines/774/1 "2013-07-11T14:54:59Z")

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So I have a bunch of 3d lines. I have a bunch of duplicates, but SelDup isn’t picking them up. My guess is that they are ever so slightly off.

Is there a command that will let me select and remove them? I’ve also had similar issues in the past with curves… something that would help with that too would be very useful.

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**Author:** ![pascal](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/pascal/32/479395_2.png) [@pascal](https://discourse.mcneel.com/u/pascal)\
**Post date:** [July 11, 2013, 3:08pm UTC](https://discourse.mcneel.com/t/how-to-remove-nearly-duplicate-curves-lines/774/2 "2013-07-11T15:08:25Z")

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Hi Tom- there is nothing built in for a SelDup with tolerance… it is a not infrequent request though. SelDup is super strict, it is not looking at the shape of the things in space but at the definitions in the database.

-Pascal