Hi,
I am trying to book award tickets for two, LAX to DXB with a stop-over in ICN.
Korean Air website shows good availability but when I click the calculate button a pop up window comes up with the following message:

A System error has occurred while processing.

[ERT-4004]

bbaf55ef28054374abe776c844259f31

My dates are 12-26-16 and 12-29-16, thanks for the help.
JCD