Hi Matthias,
another useful setting is in diproxyserver.properties:
# The value in minutes when a pendig and not yet completed DI-transaction is deemed as orphaned and therefore will
# be cleant out of the internal transaction-list.
# If this property is not specified ot has not a positive value, a default of 10 is taken.
ORPHANED=30
I set this value for 3 minutes.
Regards,
Jan