How to add an attribute PredefinedType

[DaivaMarcinkeviciute]

I have an IFC file with some ifcSpaces that do not have a predefined type. I'd like to add predefined type "GFA" and i tried this:

elements = ifcFile.by_type("IfcSpace")
or element in elements:
    element.PredefinedType = 'GFA' 

Yet i get an error "list index out of range", as the space doesn't have such attribute.
I found a way to add properties with ifcFile.createIfcPropertySingleValue, but nothing for creating attributes, as they are suposed to be fixed. How can i add PredefinedType?

Thanks in advance

[aothms]

In the IFC2X3 version of the schema the attribute does not exist. It's a new addition in IFC4. You can try to use the Schema migration utilities in IfcOpenShell to try and upgrade your files. https://standards.buildingsmart.org/IFC/RELEASE/IFC2x3/TC1/HTML/ifcproductextension/lexical/ifcspace.htm Sent from a mobile device, excuse my brevity. Kind regards, Thomas Op do 21 sep. 2023 17:30 schreef DaivaMarcinkeviciute < ***@***.***>:

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I have an IFC file with some ifcSpaces that do not have a predefined type. I'd like to add predefined type "GFA" and i tried this: elements = ifcFile.by_type("IfcSpace") or element in elements: element.PredefinedType = 'GFA' Yet i get an error "list index out of range", as the space doesn't have such attribute. I found a way to add properties with ifcFile.createIfcPropertySingleValue, but nothing for creating attributes, as they are suposed to be fixed. How can i add PredefinedType? Thanks in advance — Reply to this email directly, view it on GitHub <#3784>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAILWV7LHGFFMKXFQQJG4Z3X3RMRJANCNFSM6AAAAAA5BXYV5U> . You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>

[DaivaMarcinkeviciute]

Thanks for the answer! The IFC Schema was indeed the problem. I used this code to upgrade it to IFC4:
https://github.com/IfcOpenShell/IfcOpenShell/blob/v0.7.0/src/ifcpatch/ifcpatch/recipes/Migrate.py#L46-L49
Afterwards adding PredefinedType worked.