I have an upcoming itinerary on LH : BOS-FRA-BCN-MUC-BUD-MUC-IST-MUC-BOS All segments, except the last two IST-MUC MUC-BOS are booked in J The IST-MUC and MUC-BOS segments are booked in B-class. Trying to use Continental Miles (20K) to do a Star Alliance upgrade B to J for the final flight MUC-BOS. Used the web interface on continental.com; which seemed to work (it advised there was availability on the IST-MUC and MUC-BOS flight, I chose the MUC-BOS flight for 20K miles), but after selecting the segment and authorizing the request I was greeted with an error message. The miles (20K miles) were deducted from the CO account, and then redeposited approximately 24 hours later. Called Continental today (Star Alliance Upgrade Desk), and the agent also saw availability; but received an error when she tried to process the upgrade. Was told that it has to be done by the automated system, and that they are aware of 'issues' with CO requesting Star Alliance upgrades on LH. Called LH, and the agent said there seemed to be upgrade availability, but only CO can process the upgrade (which is what I expected). So, do I just keep trying every day? Can a CO supervisor process this manually? any other suggestions?