topic Re: Python AddParameter method question for Revit2023 in Revit API Forum

Python AddParameter method question for Revit2023

f_cat — Thu, 10 Aug 2023 09:56:49 GMT

Hello,

My question is very similar to this post but could not solve my problem.

https://forums.autodesk.com/t5/revit-api-forum/how-to-use-forgetypeid-to-add-family-parameters-to-a-family-in/m-p/11591733#M67741

To add material parameter as family type parameter, here is my python code for Revit2020;

material_param = family_doc.FamilyManager.AddParameter("material_name",DB.BuiltInParameterGroup.PG_MATERIALS, DB.ParameterType.Material, False)

And I arranged it for 2023 but error occurs is this;

materialgroupTypeId = GroupTypeId.Materials familyCategory= Category.GetBuiltInCategoryTypeId(BuiltInCategory.OST_Materials) material_param = fam_doc.FamilyManager.AddParameter("material_name_string", materialgroupTypeId, familyCategory, False)

The error message came out when the code run is this;

Runtime error (ArgumentException): Not a spec Parameter name: specTypeId

I created it based on the method

AddParameter(String, BuiltInParameterGroup, Category, Boolean)

however, should I be using

AddParameter(String, ForgeTypeId, ForgeTypeId, Boolean)

instead?

Would anyone be able to offer some advice?

Kato

Re: Python AddParameter method question for Revit2023

RPTHOMAS108 — Thu, 10 Aug 2023 11:00:28 GMT

For FamilyManager.AddParameter(String, ForgeTypeId, ForgeTypeId, Boolean)

Use SpecTypeId.Reference.Material for spec arg. (2nd ForgeTypeId).

And GroupTypeId.Materials (or some other group) for Group arg. (1st ForgeTypeId).

The overload you was trying to use is for controlling type of nested family.

Re: Python AddParameter method question for Revit2023

f_cat — Thu, 10 Aug 2023 12:08:03 GMT

Thank you RPTHOMAS108,

Now I understand the construction of the method.

You saved my life!!!

Have a goood day!