# Element.SetParameterByName(element, parameter, value) It's not working
**URL:** https://forum.dynamobim.com/t/element-setparameterbyname-element-parameter-value-its-not-working/113084
**Category:** Revit
**Tags:** python
**Created:** [November 15, 2025, 10:35am UTC](https://forum.dynamobim.com/t/element-setparameterbyname-element-parameter-value-its-not-working/113084 "2025-11-15T10:35:32Z")
**Posts on this page:** 12
**Page:** 1
### Author:  [@ingalvolt](https://forum.dynamobim.com/u/ingalvolt)
#### Post date: [November 15, 2025, 10:35am UTC](https://forum.dynamobim.com/t/element-setparameterbyname-element-parameter-value-its-not-working/113084/1 "2025-11-15T10:35:32Z")
```auto
See image
I created 2 floors and
4 parameters (c1, c2, c3, c4) with 4 data points (data1, data2, data3, data4)
I use the node
Element.SetParameterByName(element, parameter, value)
element = 2 floors
parameter = 4 parameters
value = 4 data points
I'm getting an error in Python
Help?
Thanks
```
---
### Author:  [@christian.stan](https://forum.dynamobim.com/u/christian.stan)
#### Post date: [November 15, 2025, 12:15pm UTC](https://forum.dynamobim.com/t/element-setparameterbyname-element-parameter-value-its-not-working/113084/2 "2025-11-15T12:15:12Z")
hi
```auto
import sys
import clr
clr.AddReference('ProtoGeometry')
from Autodesk.DesignScript.Geometry import *
# do you have import this lines under
#---------------
clr.AddReference('RevitNodes')
import Revit
clr.ImportExtensions(Revit.GeometryConversion)
clr.ImportExtensions(Revit.Elements)
#---------------
elts=IN[0]
param=IN[1]
vals=IN[2]
OUT = [e.SetParameterByName(p,v) for e in elts for p,v in zip(param,vals)]
```
cordially
christian.stan
---
### Author:  [@ingalvolt](https://forum.dynamobim.com/u/ingalvolt)
#### Post date: [November 15, 2025, 4:03pm UTC](https://forum.dynamobim.com/t/element-setparameterbyname-element-parameter-value-its-not-working/113084/3 "2025-11-15T16:03:29Z")
```auto
Thanks for the reply.
I have an error
at parameter
but it doesn't exist.
What am I doing wrong?
```
---
### Author:  [@c.poupin](https://forum.dynamobim.com/u/c.poupin)
#### Post date: [November 15, 2025, 5:25pm UTC](https://forum.dynamobim.com/t/element-setparameterbyname-element-parameter-value-its-not-working/113084/4 "2025-11-15T17:25:45Z")
Hi,
Check that the names of your parameters are correct.
Here is a solution.
```python
import sys
import clr
import System
clr.AddReference('ProtoGeometry')
from Autodesk.DesignScript.Geometry import *
# do you have import this lines under
clr.AddReference('RevitAPI')
import Autodesk
from Autodesk.Revit.DB import *
import Autodesk.Revit.DB as DB
clr.AddReference('RevitServices')
import RevitServices
from RevitServices.Persistence import DocumentManager
from RevitServices.Transactions import TransactionManager
doc = DocumentManager.Instance.CurrentDBDocument
#---------------
clr.AddReference('RevitNodes')
import Revit
clr.ImportExtensions(Revit.GeometryConversion)
clr.ImportExtensions(Revit.Elements)
#---------------
elts=UnwrapElement(IN[0])
param=IN[1]
vals=IN[2]
TransactionManager.Instance.EnsureInTransaction(doc)
for e in elts:
for p_name,value in zip(param,vals):
# check if parameter exist
para = e.LookupParameter(p_name)
if para:
# using Revit Dynamo
e_dsType = e.ToDSType(True)
e_dsType.SetParameterByName(p_name,value)
# OR using Revit API
para.SetValueString(str(value))
TransactionManager.Instance.TransactionTaskDone()
```
---
### Author:  [@christian.stan](https://forum.dynamobim.com/u/christian.stan)
#### Post date: [November 15, 2025, 5:50pm UTC](https://forum.dynamobim.com/t/element-setparameterbyname-element-parameter-value-its-not-working/113084/5 "2025-11-15T17:50:27Z")
if parameter don’t exist
try this
```auto
import sys
import clr
clr.AddReference('ProtoGeometry')
from Autodesk.DesignScript.Geometry import *
# do you have import this lines under
#---------------
clr.AddReference('RevitNodes')
import Revit
clr.ImportExtensions(Revit.GeometryConversion)
clr.ImportExtensions(Revit.Elements)
#---------------
elts=IN[0]
param=IN[1]
vals=IN[2]
OUT = [e.SetParameterByName(p,v) for e in elts for p,v in zip(param,vals) if p in [e.Name for e in e.Parameters]]
```
cordially
christian.stan
---
### Author:  [@ingalvolt](https://forum.dynamobim.com/u/ingalvolt)
#### Post date: [November 17, 2025, 8:25am UTC](https://forum.dynamobim.com/t/element-setparameterbyname-element-parameter-value-its-not-working/113084/6 "2025-11-17T08:25:15Z")
```auto
Thanks for your help...solved
```
---
### Author:  [@ingalvolt](https://forum.dynamobim.com/u/ingalvolt)
#### Post date: [November 17, 2025, 8:25am UTC](https://forum.dynamobim.com/t/element-setparameterbyname-element-parameter-value-its-not-working/113084/7 "2025-11-17T08:25:44Z")
```auto
Thanks for your help......solved
```
---
### Author:  [@sovitek](https://forum.dynamobim.com/u/sovitek)
#### Post date: [November 17, 2025, 8:35am UTC](https://forum.dynamobim.com/t/element-setparameterbyname-element-parameter-value-its-not-working/113084/8 "2025-11-17T08:35:55Z")
Hi @ingalvolt please mark Cyrils solution if it work for you, can probably help other as well 😉
---
### Author:  [@ingalvolt](https://forum.dynamobim.com/u/ingalvolt)
#### Post date: [November 17, 2025, 8:46am UTC](https://forum.dynamobim.com/t/element-setparameterbyname-element-parameter-value-its-not-working/113084/9 "2025-11-17T08:46:21Z")
```auto
I sent it to both of them....(christian.stan and c.poipin)
What should I do?
I don't understand
Maybe I'm doing something wrong?
```
---
### Author:  [@sovitek](https://forum.dynamobim.com/u/sovitek)
#### Post date: [November 17, 2025, 8:47am UTC](https://forum.dynamobim.com/t/element-setparameterbyname-element-parameter-value-its-not-working/113084/10 "2025-11-17T08:47:39Z")
yeah you can only make one solution…soooo 😉 😉 and its great if both work…so try thats there fit you best 😉 😉
---
### Author:  [@ingalvolt](https://forum.dynamobim.com/u/ingalvolt)
#### Post date: [November 17, 2025, 8:49am UTC](https://forum.dynamobim.com/t/element-setparameterbyname-element-parameter-value-its-not-working/113084/11 "2025-11-17T08:49:31Z")
Done
---
### Author:  [@sovitek](https://forum.dynamobim.com/u/sovitek)
#### Post date: [November 17, 2025, 8:50am UTC](https://forum.dynamobim.com/t/element-setparameterbyname-element-parameter-value-its-not-working/113084/12 "2025-11-17T08:50:45Z")
awesome 😉 😉