Thanks Jantzen for the quick reply. The site doesn't have the sc-tnt integration implemented. Anything else that I should be looking for?
Ridder H. Manzanet
It's hard to tell without taking a deep look into the implementation. I would check to see if any of your other code libraries reference that variable. It might be possible that an old Analytics plug-in is referencing that variable from your s_code/AppMeasument library (if you an Analytics customer). If that doesn't turn anything up, I'd recommend opening a ticket with Target Customer Care. They can gather the necessary details for an in depth look into your implementation.
Is the above issue resolved?
Thanks & Regards