Originally Posted by UA Insider

Hi avidflyer, we’re continuing to look into the examples being reported where complimentary upgrades are not always being processed. We’ve made progress here, but, there are still some cases we’re working to identify and resolve.

One use case we’re running across lately is that, by design, the system that clears complimentary upgrades stops when it tries to clear the next customer in line, and for one reason or another, cannot complete the upgrade. This most often happens, when the reservation in question needs to be reissued. Normally, this is a rare occurrence. But, as has been noted in the master thread, one side effect of the migration is that we have many more reservations than normal out there with the “A modification has been made …” message.

If you’re in a window where seats are available and upgrades should be clearing, please continue to PM us your examples. With these details, we’ll try to get anything unstuck that may be preventing the system from running as well as identify any other trends that we need to fix.

Shannon