Hi Axel, AD> unfortunately, BFS don't have a single counter for that, so that AD> you'd need to iterate over all attributes to calculate their AD> size. Would it be possible to add a counter for that on the OpenBFS level without breaking binary compatibility, and then have a compile option in OpenTracker, such as "Running on OpenBFS", and if it is, have Tracker query the attribute size from OpenBFS? Cheers - Philipp Reichmuth mailto:mailinglistenprozessor@xxxxxxx -- To have no errors / Would be life without meaning / No struggle, no joy