# An Odd Mapgen Error

**URL:** <https://discourse.cataclysmdda.org/t/an-odd-mapgen-error/22448>\
**Category:** The Toolbox\
**Created:** [January 10, 2020, 9:10pm UTC](https://discourse.cataclysmdda.org/t/an-odd-mapgen-error/22448 "2020-01-10T21:10:24Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Minecrafter\_Next\_Gen](https://sea2.discourse-cdn.com/flex016/user_avatar/discourse.cataclysmdda.org/minecrafter_next_gen/32/6504_2.png) [@Minecrafter\_Next\_Gen](https://discourse.cataclysmdda.org/u/Minecrafter_Next_Gen)\
**Post date:** [January 10, 2020, 9:10pm UTC](https://discourse.cataclysmdda.org/t/an-odd-mapgen-error/22448/1 "2020-01-10T21:10:24Z")

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Hello. I seem to posses a slight problem, having received this error.

src/main\_menu.cpp:1060 [bool main\_menu::load\_character\_tab(bool)] Error: data/mods//Miscellaneous Magiclysm Expansions/mapgen/mapsettings.json: line 26:1: requested non-existing member “type”

}  
}  
]  
^

Here is the file from which it originated:

[{  
“field”: {  
“chance”: 6,  
“extras”: {  
“mx\_helicopter”: 6,  
“mx\_military”: 2,  
“mx\_science”: 1,  
“mx\_collegekids”: 3,  
“mx\_drugdeal”: 3,  
“mx\_supplydrop”: 4,  
“mx\_portal”: 1,  
“mx\_crater”: 15,  
“mx\_portal\_in”: 1,  
“mx\_point\_dead\_vegetation”: 50,  
“mx\_grass”: 700,  
“mx\_trees”: 100,  
“mx\_fallen\_shed”: 20,  
“mx\_pond”: 20,  
“mx\_point\_burned\_ground”: 50,  
“mx\_casings”: 20,  
“mx\_corpses”: 3,  
“mx\_deadsum”: 3  
}  
}  
}  
]  
How doth one rid themselves of it?

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<div class="post-metadata">

**Author:** ![Zhilkin](https://sea2.discourse-cdn.com/flex016/user_avatar/discourse.cataclysmdda.org/zhilkin/32/3749_2.png) [@Zhilkin](https://discourse.cataclysmdda.org/u/Zhilkin)\
**Post date:** [January 11, 2020, 8:53am UTC](https://discourse.cataclysmdda.org/t/an-odd-mapgen-error/22448/2 "2020-01-11T08:53:15Z")

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You are using broken mod. Either disable it or contact mod maintainer/author to fix it.

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<div class="post-metadata">

**Author:** ![Minecrafter\_Next\_Gen](https://sea2.discourse-cdn.com/flex016/user_avatar/discourse.cataclysmdda.org/minecrafter_next_gen/32/6504_2.png) [@Minecrafter\_Next\_Gen](https://discourse.cataclysmdda.org/u/Minecrafter_Next_Gen)\
**Post date:** [January 11, 2020, 10:48pm UTC](https://discourse.cataclysmdda.org/t/an-odd-mapgen-error/22448/4 "2020-01-11T22:48:52Z")

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How is this broken? I am  
this modifications manager, how could I repair it?

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<div class="post-metadata">

**Author:** ![Zhilkin](https://sea2.discourse-cdn.com/flex016/user_avatar/discourse.cataclysmdda.org/zhilkin/32/3749_2.png) [@Zhilkin](https://discourse.cataclysmdda.org/u/Zhilkin)\
**Post date:** [January 12, 2020, 4:58pm UTC](https://discourse.cataclysmdda.org/t/an-odd-mapgen-error/22448/5 "2020-01-12T16:58:25Z")

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See example of valid format for `regional_overlay` in one of bundled mods - e.g. [https://github.com/CleverRaven/Cataclysm-DDA/blob/a637d514b20aa893d4370ba3b7efbfcd950b4ef0/data/mods/Magiclysm/worldgen/regional\_overlay.json](https://github.com/CleverRaven/Cataclysm-DDA/blob/a637d514b20aa893d4370ba3b7efbfcd950b4ef0/data/mods/Magiclysm/worldgen/regional_overlay.json)