# Error while using DeleteMissing?

**URL:** <https://community.wolfram.com/t/error-while-using-deletemissing/16933>\
**Category:** Questions\
**Tags:** graphics-and-visualization, geography, computational-humanities\
**Created:** [October 28, 2020, 7:54am UTC](https://community.wolfram.com/t/error-while-using-deletemissing/16933 "2020-10-28T07:54:37Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![snknewscoup](https://avatars.discourse-cdn.com/v4/letter/s/da6949/32.png) [@snknewscoup](https://community.wolfram.com/u/snknewscoup)\
**Post date:** [October 28, 2020, 7:54am UTC](https://community.wolfram.com/t/error-while-using-deletemissing/16933/1 "2020-10-28T07:54:37Z")

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Hi, I just joined the Wolfram community and was trying out Mathematica for mapping and research purposes. I came across a very help guide to making historical animated maps, however I am encountering issues when I try to implement it. I’m pasting the code below and as I am a beginner, any help would be appreciated. I really want to benefit and enjoy from this platform.

Thanks,

Shahmir

 ![Screen Shot 2020-10-28 at 3.54.15 AM.jpg](https://global.discourse-cdn.com/wolfram/original/3X/6/5/655f435db3c1fa4477966503126d6c9b33183422.jpeg)  
 ![Screen Shot 2020-10-28 at 3.54.23 AM.png](https://global.discourse-cdn.com/wolfram/original/3X/f/2/f202e313226853c0c164e341d4cce7fd9d04f14a.png)  
 ![Screen Shot 2020-10-28 at 3.54.28 AM.jpg](https://global.discourse-cdn.com/wolfram/original/3X/b/1/b14bcac0b9e949757f9cf97618a52674bea6525e.jpeg)

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**Author:** ![wolframcommunity](https://yyz1.discourse-cdn.com/wolfram/user_avatar/community.wolfram.com/wolframcommunity/32/8335_2.png) [@wolframcommunity](https://community.wolfram.com/u/wolframcommunity)\
**Post date:** [October 28, 2020, 9:46am UTC](https://community.wolfram.com/t/error-while-using-deletemissing/16933/2 "2020-10-28T09:46:25Z")

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Welcome to Wolfram Community! Please make sure you know the rules: [https://wolfr.am/READ-1ST](https://wolfr.am/READ-1ST)

The rules explain how to format your code properly. Images don’t help other members to copy your code. Please **EDIT** your post and make sure code blocks start on a new paragraph and look framed and colored like this.

```
int = Integrate[1/(x^3 - 1), x];
Map[Framed, int, Infinity]

```

You can also embed notebook or attach notebook.

 ![ScreenShot2020-04-10at6.10.59PM.png](https://global.discourse-cdn.com/wolfram/original/3X/5/0/50feff4a0bbc61bdedec57d3625d8a38ade7ce64.png)

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**Author:** ![mikebesso](https://yyz1.discourse-cdn.com/wolfram/user_avatar/community.wolfram.com/mikebesso/32/22282_2.png) [@mikebesso](https://community.wolfram.com/u/mikebesso)\
**Post date:** [October 30, 2020, 3:34pm UTC](https://community.wolfram.com/t/error-while-using-deletemissing/16933/3 "2020-10-30T15:34:45Z")

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Shahmir:

You have a typo. Look for the blue _PolygonList_ in your screenshot. You declared the variable _polygonList_ a few lines before. The Wolfram Language is case sensitive. So, _PolygonList_ is not yet defined here.

Have a great weekend.