Can sentinel2 be processed big datausing sen2cor?

[ABraun]

the same error is reported here and bboughton found a solution. I can’t guarantee that it works for you, too. But it should be worth a try.

Sen2cor: KeyError: 'gfs'

So… temporary hack is to go into the L2A GRANULES/QI_DATA and delete all files that end with .gfs then re-run L2A_Process. It will recognise all bands have already been processed and finish the job successfully in a few seconds.