"Null" result Given By FamilyInstance.ByFace Node

[robert12546358]

Hi everybody,

I want to set family by point with surface but getting value is “null”.
Please suggest me what to do.

Thanks

[chuongmep]

Can upload file error and scripts ?

[robert12546358]

Hi @chuongmep

I upload a Test file & script.

test.rvt (1.8 MB)

Test.dyn (62.2 KB)

[chuongmep]

You need check Family Support place to face. : “M20…”

[chuongmep]

test.rvt (2.0 MB)
Test.dyn (72.0 KB)

[robert12546358]

Thanks for your reply
it’s working is fine for single surface but i want use multiple surface.

i checked same script for multiple surface but answer is “null” that my question.

[chuongmep]

if you want do that, you need define what face need place , next filter and use it map count with number point to place.
Example : you have 3 surface , you need 3 point to place and don’ use list level (L1)

[robert12546358]

I use two surface & i get two points for every surface. (shown as below) Then remove list level(L1).
result is null also. And also use List.chop for surface.

[chuongmep]

Try Flatten All List To Match with count surface ,
Surface need create to 4 count.

[robert12546358]

Can you give me a snip what you do?

[chuongmep]

[robert12546358]

For manual surface selection its work properly, but when I try to select Surface from Wall by filter its give result null.
Please go through with attached snip for clarification.

Thank You

[chuongmep]

Currently I cannot reproduce this error to help you, please attach exactly what is going on with you.

[robert12546358]

I select wall by category, then filter by material paint , then select opposite of surface (Opposite side
of Pink colour).

Here I attached Dynamo Script file and also Run file, please go through.
Thank You
test.rvt (1.8 MB) Test.dyn (68.4 KB)

[chuongmep]

It working for me, what problem with you ?

[robert12546358]

I think you are select manual selection. i give you a new snip for your understand.

[chuongmep]

Try some like that :

[robert12546358]

Thank You so much for your help,

[chuongmep]

You are welcome.