Hi everyone. Can anyone point me what I’m doing grong? I’m trying to get the value of a shared parameters base on it’s GUID. The Revit API, says that the method get_Parameter() is the safest ways to do that, but when I’m trying o got an error saying that get_Parameter is not a valid method for Fa…

havent tried not at dyn…, but guess a shared parameter can have many values and be assigned to many categories,

yes, but still has the same GUID

yeah :slight_smile: and if i remember the same guid no matter instance or type parameter…probably wrong [Skærmbillede 2025-10-14 193128] guid.dyn (13.3 KB)

[image] Create Project Parameter from Shared Parameter In our company we share the shared parameters (protocol) as a file with our project partners such as construction and the MEP guys aswell. Consistancy is key in some projects. This allows us to create fil…

Exactly, the problem here is that no matter which categories are applied the parameter, the point here is get the values of the parameter of the selected elements, in this case the elements are Family Instances. According to the Revit API, should be possible to get the values. :frowning: but don’t …

Get and SetParameterByParameterGUID has be a wish for a long time.

You’re looking at the documentation that exists to direct you to the recommended alternative there, but you want the API call itself. Revit API 2026 Documentation Note that the call is element.Parameter[guid], and that syntax isn’t valid in Python. As such the…

This very helpfull. I notice that get_Patameter method is available. It it needs a System.Guid I’m still working whit this. Keep you update. [image]

You’re pretty close now… [image] AntonioRojas: p = el.get_Parameter(guids) Try OUT = guids.__class__ to see what type of object guids is in your original code. Then try OUT = guids.__class__, guids[0].__class__ to see something else.

As you said, depends on which python enginee you use, the result is different. I’m working whit a CableTray IronPython2 dir(element) = IronPython.Runtime.Types.PythonType [image] CPython3 TypeError [image] Do you have a resource to understand, in deep, why this is happening.

Get parameter value by GUID

Revit

Marcel_Rijsmus October 14, 2025, 5:38pm 5

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Get parameter value by GUID

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