# Ch 2 Challenge Problem

**URL:** <https://forums.kodeco.com/t/ch-2-challenge-problem/54769>\
**Category:** Metal by Tutorials\
**Created:** [November 6, 2018, 5:28pm UTC](https://forums.kodeco.com/t/ch-2-challenge-problem/54769 "2018-11-06T17:28:55Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![jg764551](https://s3.amazonaws.com/cdn.raywenderlich.com/community/forum-assets/noun-game-ghost-878668.png) [@jg764551](https://forums.kodeco.com/u/jg764551)\
**Post date:** [November 6, 2018, 5:28pm UTC](https://forums.kodeco.com/t/ch-2-challenge-problem/54769/1 "2018-11-06T17:28:55Z")

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Hello,  
I’m able to get the train.obj to appear properly after following along with the instructions. Yet, I find that the playground in the Challenge folder is merely the same as the one in the Starter and Final folders. I tried changing the name of the file from “train” to “mushroom” in my working playground but I get the fatal error. I looked at the .obj file in text edit but I cannot see what the problem would be.

Thanks

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**Author:** ![caroline](https://assets.chunter.kodeco.com/user_avatar/forums.kodeco.com/caroline/32/111867_2.png) [@caroline](https://forums.kodeco.com/u/caroline)\
**Post date:** [November 7, 2018, 12:30am UTC](https://forums.kodeco.com/t/ch-2-challenge-problem/54769/2 "2018-11-07T00:30:28Z")

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Hi @jg764551

I just re-downloaded to check the projects - you may not be on the correct playground page?

In the challenge playground, make sure the project navigator appears on the left - that’s Cmd 0 (or use the icons at the top right of Xcode)

Select the `Import Mushroom` page, and your mushroom should render.

![render-mushroom](https://files.chunter.kodeco.com/original/3X/d/1/d16f47f6d8d3a44110c7c0b3c07b4387b6d9e515.png)

Hopefully from this you’ll be able to compare your code it its code and work out what’s wrong. If not, please ask for further help.

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<div class="post-metadata">

**Author:** ![jg764551](https://s3.amazonaws.com/cdn.raywenderlich.com/community/forum-assets/noun-game-ghost-878668.png) [@jg764551](https://forums.kodeco.com/u/jg764551)\
**Post date:** [November 7, 2018, 1:40am UTC](https://forums.kodeco.com/t/ch-2-challenge-problem/54769/3 "2018-11-07T01:40:06Z")

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Thank you Caroline. I was just opening the playground from Finder. This did work for me.