hi joris,

can you tell me exactly what you were doing when you got this error?

my first guess is that you were trying to export orders, but didn't select any for exporting- in which case, i'm missing some error-checking to avoid running a bad SQL query when there are no orders selected. try selecting a few orders before clicking export, and see if that works better.

i'll have a closer look at this later today, if you can let me know some more details.