Child attribute in family cannot export in IFC file

[Anonymous]

there is one family. the family have two child objects.

Each child object have Extrusion start and Extrusion End attribute

[question] why two attributes (Extrusion start and Extrusion End) cannot find in IFC file?

thanks for your help

pipe-cap.rvt

pipe-cap.ifc.zip

[kimberly_fuhrman-jones]

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