Hi Zopers It seems that there is a bug in ZTUtil.Batch: when the batch should be the length of the batch and there are exactly as many orphans as there would fit on one page the length of the batch becomes size instead of size+orphans. Here are the numbers: no of batches start end orphan length sequence_length 1 1 12 3 12 12 1 1 10 3 10 13 <<< WRONG, end/length should be 13 2 1 10 3 10 14 So, there is a jump on the edge where there should be one batch of the length sequence_length == length+orphans. At that point 3 (in the above case) items disappear. I have looked at the code in Batch.py but not found the solution, yet. Who can find the bug and a solution? thanks Andre -- ------------------------------------------------------------------------------ The disclaimer that applies to e-mail from TNO Physics and Electronics Laboratory can be found on: http://www.tno.nl/disclaimer/email.html ------------------------------------------------------------------------------