Vitual Cubes in saiku analytics

Hi,
I am using saiku anakytics for adhoc analysis. When i add virtual cube to my schema from workbench it published successfully but in saiku analytics my whole schema disappears. Can some one guide me how can i see virtual cubes on saiku analytics.
I am using pentaho 6.0.
I read somewhere that virtual cubes are no longer available in mondrian 4.0.
Can someone guide me on this.

Thanks