# Select All Walls of Certain Type on Level

**URL:** <https://forum.dynamobim.com/t/select-all-walls-of-certain-type-on-level/19374>\
**Category:** Revit\
**Created:** [February 23, 2018, 12:20pm UTC](https://forum.dynamobim.com/t/select-all-walls-of-certain-type-on-level/19374 "2018-02-23T12:20:24Z")\
**Posts on this page:** 10\
**Page:** 1

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**Author:** ![jrichards](https://avatars.discourse-cdn.com/v4/letter/j/c6cbf5/32.png) [@jrichards](https://forum.dynamobim.com/u/jrichards)\
**Post date:** [February 23, 2018, 12:20pm UTC](https://forum.dynamobim.com/t/select-all-walls-of-certain-type-on-level/19374/1 "2018-02-23T12:20:24Z")

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Hi All,

Very new to Dynamo.

How do I select all walls of a certain type on a certain level. I’ve been playing around with the selection nodes in Dynamo but not having any luck. Surely it should be a straight forward script to write.

Any help would be much appreciated.

James.

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**Author:** ![Marcel\_Rijsmus](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/marcel_rijsmus/32/8539_2.png) [@Marcel\_Rijsmus](https://forum.dynamobim.com/u/Marcel_Rijsmus)\
**Post date:** [February 23, 2018, 1:05pm UTC](https://forum.dynamobim.com/t/select-all-walls-of-certain-type-on-level/19374/3 "2018-02-23T13:05:08Z")

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Use filter by boolean mask  
Search this forum for filter by boolean and study what you find

![image](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/b/3/b36ddfdbf0ba72330390289bcb7b522f99191869.png)

Marcel

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**Author:** ![Johannes\_Meiners](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/johannes_meiners/32/9156_2.png) [@Johannes\_Meiners](https://forum.dynamobim.com/u/Johannes_Meiners)\
**Post date:** [February 23, 2018, 1:16pm UTC](https://forum.dynamobim.com/t/select-all-walls-of-certain-type-on-level/19374/4 "2018-02-23T13:16:31Z")

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Try this:

 ![Capture](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/b/7/b7de616aa0b8a4a7cee5690d1dae4fbfe5108ce8.png)

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**Author:** ![i.soler](https://avatars.discourse-cdn.com/v4/letter/i/6de8d8/32.png) [@i.soler](https://forum.dynamobim.com/u/i.soler)\
**Post date:** [March 4, 2021, 4:52pm UTC](https://forum.dynamobim.com/t/select-all-walls-of-certain-type-on-level/19374/5 "2021-03-04T16:52:12Z")

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Hi Johannes, can i ask for your Dynamo version? i ask becouse i dont have a List.ContainsItem i have only List.contains… can you help me please?

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<div class="post-metadata">

**Author:** ![i.soler](https://avatars.discourse-cdn.com/v4/letter/i/6de8d8/32.png) [@i.soler](https://forum.dynamobim.com/u/i.soler)\
**Post date:** [March 4, 2021, 5:03pm UTC](https://forum.dynamobim.com/t/select-all-walls-of-certain-type-on-level/19374/6 "2021-03-04T17:03:24Z")

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This is my problem 😕 help please

 ![image](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/3/3/335895d8de71d959d6a45fff3039fb0b2a4ab332.png)

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**Author:** ![jfbrigaud](https://avatars.discourse-cdn.com/v4/letter/j/a4c791/32.png) [@jfbrigaud](https://forum.dynamobim.com/u/jfbrigaud)\
**Post date:** [March 4, 2021, 5:56pm UTC](https://forum.dynamobim.com/t/select-all-walls-of-certain-type-on-level/19374/7 "2021-03-04T17:56:20Z")

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Hello,

```
You need to set the lacing.

```

![lacing](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/8/4/84fe2a80bd14673d9508a9db615683ad0c84a86e.png)

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**Author:** ![jfbrigaud](https://avatars.discourse-cdn.com/v4/letter/j/a4c791/32.png) [@jfbrigaud](https://forum.dynamobim.com/u/jfbrigaud)\
**Post date:** [March 4, 2021, 6:16pm UTC](https://forum.dynamobim.com/t/select-all-walls-of-certain-type-on-level/19374/8 "2021-03-04T18:16:13Z")

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Or like this:

 ![lacing2.PNG](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/9/d/9d5e7cfc10ba55363e63d9db27056228dfd39212.jpeg)

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<div class="post-metadata">

**Author:** ![i.soler](https://avatars.discourse-cdn.com/v4/letter/i/6de8d8/32.png) [@i.soler](https://forum.dynamobim.com/u/i.soler)\
**Post date:** [March 5, 2021, 10:26am UTC](https://forum.dynamobim.com/t/select-all-walls-of-certain-type-on-level/19374/9 "2021-03-05T10:26:40Z")

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thanks so much!

 ![image](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/8/b/8b6f3937c9e7bd7e75a6d630226360b6d2467bf7.png)

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<div class="post-metadata">

**Author:** ![i.soler](https://avatars.discourse-cdn.com/v4/letter/i/6de8d8/32.png) [@i.soler](https://forum.dynamobim.com/u/i.soler)\
**Post date:** [March 5, 2021, 11:49am UTC](https://forum.dynamobim.com/t/select-all-walls-of-certain-type-on-level/19374/10 "2021-03-05T11:49:21Z")

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I have an other question  
With which Node I can modify the heights of the already selected walls ?

 ![image](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/c/f/cf129d644e35a53dd4752e78f1c0cbdb4324ea9a.png)

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<div class="post-metadata">

**Author:** ![scott.tomlinson](https://avatars.discourse-cdn.com/v4/letter/s/67e7ee/32.png) [@scott.tomlinson](https://forum.dynamobim.com/u/scott.tomlinson)\
**Post date:** [March 7, 2021, 7:57am UTC](https://forum.dynamobim.com/t/select-all-walls-of-certain-type-on-level/19374/11 "2021-03-07T07:57:43Z")

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Hi, I believe you need to feed the elements (from the boolmask), not the element types into the SetParameterByName node.