export parametric cell to IFC, when file is on reference IFC is empty !!

Hi,

I would like to export my file to IFC, the contents of my file are only some paremetrics cells (cube and cylinder) 

I've no probleme when I export directly to IFC, but when same file is on reference IFC is EMPTY !!!

Iook my screenshoots 

1 wall

1 duct

4 parametrics cells

IFC = OK

parametrics cells in reference

IFC

1 Wall

1 Duct

4 parametrics cells Are missing !!!

to be complete my datagroup catalogue

thanks for your feed back

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