VXL - Changing nets on pins of components not placed with XL

[Tim]

In some of my layouts, that are placed with VXL, I place cells by hand
which have pins for connectivity. These cells do not matchup to any
components in the schematic. The pins on these cells retain the net
name of the first net that is attached to them so if the net name is
changed through an ECO the pin doesn't get updated during the "Update
components and Nets" and will continuosly get an error marker placed on
it. Is there a way to update the net names attached to the pins of
these cells?

Thanks in Advance,
Tim