# VTK decimator pro dosent recognise sub meshes in obj file

**URL:** https://discourse.vtk.org/t/vtk-decimator-pro-dosent-recognise-sub-meshes-in-obj-file/4501
**Category:** Support
**Created:** [October 28, 2020, 6:57am UTC](https://discourse.vtk.org/t/vtk-decimator-pro-dosent-recognise-sub-meshes-in-obj-file/4501 "2020-10-28T06:57:37Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![Rahul07](https://discourse.vtk.org/letter_avatar_proxy/v4/letter/r/9fc29f/32.png) [@Rahul07](https://discourse.vtk.org/u/Rahul07)
#### Post date: [October 28, 2020, 6:57am UTC](https://discourse.vtk.org/t/vtk-decimator-pro-dosent-recognise-sub-meshes-in-obj-file/4501/1 "2020-10-28T06:57:37Z")

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Hi, I have an obj file with contains g tags, when I import the obj file decimate it and export it, it contains only one single mesh (it neglects g tags).

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### Author: ![lassoan](https://discourse.vtk.org/user_avatar/discourse.vtk.org/lassoan/32/50_2.png) [@lassoan](https://discourse.vtk.org/u/lassoan)
#### Post date: [October 29, 2020, 1:52pm UTC](https://discourse.vtk.org/t/vtk-decimator-pro-dosent-recognise-sub-meshes-in-obj-file/4501/2 "2020-10-29T13:52:50Z")

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What do you mean by tags?