# Wall Reference is "null" **URL:** \ **Category:** Packages\ **Tags:** python, dynamo\ **Created:** [March 15, 2021, 3:06am UTC](https://forum.dynamobim.com/t/wall-reference-is-null/61566 "2021-03-15T03:06:59Z")\ **Posts on this page:** 11\ **Page:** 1
**Author:** ![robert12546358](https://avatars.discourse-cdn.com/v4/letter/r/c5a1d2/32.png) [@robert12546358](https://forum.dynamobim.com/u/robert12546358)\ **Post date:** [March 15, 2021, 3:06am UTC](https://forum.dynamobim.com/t/wall-reference-is-null/61566/1 "2021-03-15T03:06:59Z")
Hi All I want to get Reference of wall, i try to **Wall edges reference** node but output is **null**. please suggest me how to fix this. ![image](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/1/f/1f27d1c9a321733a03287d3d2b51f55d0f3ed4b6.png) ---
**Author:** ![Alban\_de\_Chasteigner](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/alban_de_chasteigner/32/39650_2.png) [@Alban\_de\_Chasteigner](https://forum.dynamobim.com/u/Alban_de_Chasteigner)\ **Post date:** [March 15, 2021, 9:34am UTC](https://forum.dynamobim.com/t/wall-reference-is-null/61566/2 "2021-03-15T09:34:48Z")
Hi @robert12546358, What kind of wall is it ? The _Wall Edges References_ node works with linked walls : ![wall edges](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/f/d/fde362e63ca039b9525c482fbcd48eacbcf3f82f.png) ---
**Author:** ![robert12546358](https://avatars.discourse-cdn.com/v4/letter/r/c5a1d2/32.png) [@robert12546358](https://forum.dynamobim.com/u/robert12546358)\ **Post date:** [March 15, 2021, 10:02am UTC](https://forum.dynamobim.com/t/wall-reference-is-null/61566/3 "2021-03-15T10:02:49Z")
Thanks for reply, Its just a simple default wall, and also I want side wall reference (left side and right side of wall) ---
**Author:** ![Alban\_de\_Chasteigner](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/alban_de_chasteigner/32/39650_2.png) [@Alban\_de\_Chasteigner](https://forum.dynamobim.com/u/Alban_de_Chasteigner)\ **Post date:** [March 15, 2021, 10:04am UTC](https://forum.dynamobim.com/t/wall-reference-is-null/61566/4 "2021-03-15T10:04:59Z")
Is the _Genius Loci_ package up to date ? Does it work with another random wall ? ---
**Author:** ![robert12546358](https://avatars.discourse-cdn.com/v4/letter/r/c5a1d2/32.png) [@robert12546358](https://forum.dynamobim.com/u/robert12546358)\ **Post date:** [March 15, 2021, 10:09am UTC](https://forum.dynamobim.com/t/wall-reference-is-null/61566/5 "2021-03-15T10:09:33Z")
I use a Basic wall. ---
**Author:** ![Alban\_de\_Chasteigner](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/alban_de_chasteigner/32/39650_2.png) [@Alban\_de\_Chasteigner](https://forum.dynamobim.com/u/Alban_de_Chasteigner)\ **Post date:** [March 15, 2021, 10:11am UTC](https://forum.dynamobim.com/t/wall-reference-is-null/61566/6 "2021-03-15T10:11:16Z")
I have never encountered this error with a basic wall. Can you share your Revit file? ---
**Author:** ![robert12546358](https://avatars.discourse-cdn.com/v4/letter/r/c5a1d2/32.png) [@robert12546358](https://forum.dynamobim.com/u/robert12546358)\ **Post date:** [March 15, 2021, 10:12am UTC](https://forum.dynamobim.com/t/wall-reference-is-null/61566/7 "2021-03-15T10:12:39Z")
> **[TEST-01.rvt](https://drive.google.com/file/d/1L0zn7mUkaMfbBD9NMCdK_fArRuUn9N-w/view?usp=sharing)** > > Google Drive file. ---
**Author:** ![Alban\_de\_Chasteigner](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/alban_de_chasteigner/32/39650_2.png) [@Alban\_de\_Chasteigner](https://forum.dynamobim.com/u/Alban_de_Chasteigner)\ **Post date:** [March 15, 2021, 10:38am UTC](https://forum.dynamobim.com/t/wall-reference-is-null/61566/8 "2021-03-15T10:38:48Z")
The _Wall Edges References_ node is working fine. Review your Dynamo method of selecting the wall. ![image](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/1/e/1ed42ffc2c26e8cd30fdbc2c7d37767057e6e9aa.png) ---
**Author:** ![robert12546358](https://avatars.discourse-cdn.com/v4/letter/r/c5a1d2/32.png) [@robert12546358](https://forum.dynamobim.com/u/robert12546358)\ **Post date:** [March 15, 2021, 10:45am UTC](https://forum.dynamobim.com/t/wall-reference-is-null/61566/9 "2021-03-15T10:45:35Z")
After restart Revit its works fine, but I cant find a way to get the side wall reference (right side and left side of wall) ---
**Author:** ![Alban\_de\_Chasteigner](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/alban_de_chasteigner/32/39650_2.png) [@Alban\_de\_Chasteigner](https://forum.dynamobim.com/u/Alban_de_Chasteigner)\ **Post date:** [March 15, 2021, 10:50am UTC](https://forum.dynamobim.com/t/wall-reference-is-null/61566/10 "2021-03-15T10:50:42Z")
With the _Compound Edges References_ node : ![image](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/8/9/898c382a4c4132713d9f78590c0beb45474e4d65.png) ---
**Author:** ![robert12546358](https://avatars.discourse-cdn.com/v4/letter/r/c5a1d2/32.png) [@robert12546358](https://forum.dynamobim.com/u/robert12546358)\ **Post date:** [March 15, 2021, 10:54am UTC](https://forum.dynamobim.com/t/wall-reference-is-null/61566/11 "2021-03-15T10:54:20Z")
I want only two reference of those vertical references. one is left side & second is right side. ![image](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/6/0/60b314c268abaa71e2d7911e89289ff2bb0b8b71.png)