# Problems with a grid based on grasshopper

**URL:** <https://discourse.ladybug.tools/t/problems-with-a-grid-based-on-grasshopper/16683>\
**Category:** dragonfly-legacy\
**Tags:** envimet, gridbased\
**Created:** [November 25, 2021, 5:10am UTC](https://discourse.ladybug.tools/t/problems-with-a-grid-based-on-grasshopper/16683 "2021-11-25T05:10:32Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![jinsil](https://discourse.ladybug.tools/letter_avatar_proxy/v4/letter/j/e9bcb4/32.png) [@jinsil](https://discourse.ladybug.tools/u/jinsil)\
**Post date:** [November 25, 2021, 5:10am UTC](https://discourse.ladybug.tools/t/problems-with-a-grid-based-on-grasshopper/16683/1 "2021-11-25T05:10:32Z")

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Hi everyone.

I’m working on a study to analyze the local heat island effect.  
I’m having trouble entering the algorithm into grasshopper and it doesn’t show up on the ENVI-met.  
My guess is that setting the base surface seems to be the problem, so I tried several things, but nothing worked.

 ![envimet_base](https://discourse.ladybug.tools/uploads/default/original/3X/2/1/211bcdfe13e144f96c8785849446475b9b1c1aff.png)  
this is my grid base It’s supposed to be under the Surface, but I don’t know why

 ![grasshopper](https://discourse.ladybug.tools/uploads/default/original/3X/7/0/7037b8607bbe50a490a7615012bd0d45057aa604.png)  
And this is my grasshopper algorithm

I want the output from ENVI-met to look like this

 ![seoul national university'.PNG](https://discourse.ladybug.tools/uploads/default/original/3X/f/c/fc1f9d43fce3fb75bb71e86f043ca855de965afb.jpeg)

Since this is a private project, I can send you the file by email.

Thans a lot !

Park

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**Author:** ![minggangyin](https://discourse.ladybug.tools/user_avatar/discourse.ladybug.tools/minggangyin/32/216_2.png) [@minggangyin](https://discourse.ladybug.tools/u/minggangyin)\
**Post date:** [November 25, 2021, 7:58am UTC](https://discourse.ladybug.tools/t/problems-with-a-grid-based-on-grasshopper/16683/2 "2021-11-25T07:58:14Z")

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Hi @jinsil Do you install ENVI-MET with license?

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**Author:** ![jinsil](https://discourse.ladybug.tools/letter_avatar_proxy/v4/letter/j/e9bcb4/32.png) [@jinsil](https://discourse.ladybug.tools/u/jinsil)\
**Post date:** [November 26, 2021, 4:07am UTC](https://discourse.ladybug.tools/t/problems-with-a-grid-based-on-grasshopper/16683/3 "2021-11-26T04:07:28Z")

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Hi, @minggangyin

Thank you for attention.

I solve the problems a few hours ago.

But, I face another problems  
I start ENVI-core, but it become unstable.

 ![PANIC](https://discourse.ladybug.tools/uploads/default/original/3X/0/3/035d6e342cedad8883e0a7afc63035204d35a8ef.jpeg)

Can you solve this problem?

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<div class="post-metadata">

**Author:** ![minggangyin](https://discourse.ladybug.tools/user_avatar/discourse.ladybug.tools/minggangyin/32/216_2.png) [@minggangyin](https://discourse.ladybug.tools/u/minggangyin)\
**Post date:** [November 26, 2021, 5:00am UTC](https://discourse.ladybug.tools/t/problems-with-a-grid-based-on-grasshopper/16683/4 "2021-11-26T05:00:57Z")

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@jinsil This is a new question about ENVI-MET,not grasshooper. Maybe you should need ENVI-MET’s technical support