How to retrieve via spacing of a 2x2 customVia in Virtuoso?

Hi, 

I am trying to write a SKILL routine that increase and descrease number of vias with bindkeys.  I got the routine to work with stdVia but I am running into some problems with customVias.  In stdVia, you can retrieve cutspacing by using the following command:

stdVia=car(geGetSelSet()) 

stdVia->viaHeader->overrideParams

which outputs  ("cutSpacing" (0.07 0.07)) along with other via information

However, when I use the same command on a 2x2 customVia, there is no cutSpacing information.  I noticed this only happens on a 2x2 via, when a via is 3x3 or bigger the cutSpacing information does appear under overrideParams.

 I am wondering if anyone knows why this is the case and if there are other ways I can retrieve the spacing information.

Thanks,

Andy

 PS I am using IC6.1.5-64b.500.12