How to access Metal enclosures over Via

Hi All,

I am trying to access Metal Enclosures over Via using the via~>viaHeader~>overrideParams

however, for some via I do get the layer1Enc and layer2Enc and for some I don't get the Via Enclosure.

I get these below outputs

a=geGetSelSet()
a~>viaHeader~>overrideParams
((("cutRows" 4)
("cutColumns" 1)
)
)
However the Metal Enclosures are as follows

            Metal1 Metal2

Left       0.5       0.8

Right     0.5       0.8

Top        0.5       0.8

Bottom   0.5       0.8

Please tell me if I doing something wrong in this.

Thanks in Advance

Utkarsh