What version of NX and Post Builder are you using
What type of machine is this? Mill, Lathe?
If it is a mill look at the custom commands there is one there for plane selection. You and also turn on the review tool and that should list the mom variables.
John Joyce
N.C. Programming Supervisor
Barnes Aerospace, Windsor CT
NX6, NX7.5 & NX8.5
Vericut7.2.3