GetParameterValueByName returns null value

Revit
1

Hi,

Im trying to extract data from a list of columns and I cannot get the value of the “Column Location Mark” parameter.
Please check the image below.

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q.PNG1291×394 44.3 KB

2

Have you tried using .LookUpParameter(“Column Location Mark”) ?

3

Hi,

I tried the method below but still no progress.

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q.PNG905×486 51 KB

4

Also I tried the LookupParameter Method and still got nothing.

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q.PNG941×519 47.9 KB

5

So there is a parameter element that you are looking for. try looking for its storage type first before using AsString(). It can be AsValueString() etc etc

6

Have done that. I posted that on the image above.

7

so can i ask what is the storage type? :slight_smile:

8

String

9

Is Column Location Mark an instance parameter?

1 Like
10

Hi @blsalvio

Best to drop here rvt file to get clean solution. That will help others who is trying to help you.

12

Hi guys,

Sorry for the trouble. I think I already know the problem. The dynamo script creates the column at the same time getting the “Column Location Mark” parameter value. When we separated the creation of columns and getting the parameter value into different dynamo scripts, it worked.

Thank you very much for the help.