CompoundStructure.SetMaterialId() argument error

Developers
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1

Hi all,

Trying to replace the material of a layer within a compound structure but getting one of those annoying errors you can’t work out.

My code:

if cs:
    layers = cs.GetLayers()
    # Iterate through the layers and replace the material
    for i in range(len(layers)):
        if layers[i].MaterialId == find_material.Id:
            TransactionManager.Instance.EnsureInTransaction(doc)
            
            #layers[i].MaterialId = replace_material.Id
            
            cs = CompoundStructure.SetMaterialId(i, replace_material.Id)
            changed = True

This is my error:

image
image532×646 95.3 KB

This is the API docs page where; as far as I can see, there are only two arguments ?
CompoundStructureLayer Class (revitapidocs.com)

Any idea what argument I’m supposedly missing?

2

P.S. trying the script on CPython yieds the following error (which also doesn’t make sense because I’m deffo feeding it an element Id)

image
image506×640 87.8 KB

3

SetMaterialId is a method of the CompoundStructure class, not a constructor.

So you need to define WHICH compound structure you are working with, not initiate a new one. I think your compound structure is currently CS, so try this: cs.SetMaterialId(i, replace_material.Id).

4

Ahhh of course, yup that solved it thanks so much.

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