Yeah, Z inventory may occasionally be off but it is most reliable indicator we have that is available. I inventory has been shown to not correlate way more than Z (Z is a better indicator).
For those who checked Z then the upgrade failed, did you attempt to SAUA with more than one program (United and Aeroplan, for example, since UA's tool has been known to fail periodically)? Did you call after the failure to confirm Z was still available? Maybe it was removed?
Last edited by skimthetrees; Nov 19, 2019 at 9:45 am