I don't know if this is related specifically to BTreeFolder, or cataloging, but this is the problem... I added a BTreeFolder to a regular folder. I then added 13,115 DTML Documents to the BTreeFolder. I had added a ZCatalog and got it going, but the performance hit from the ZCatalog made me think twice about it so I deleted it. Unfortunately, some python process (related to Zope) starts running on my machine when I access the 13,115 records (if nothing more than to list them). I can watch the python process start eating memory (Zope normally uses about 8% on that system, but when the runaway process is going, it moves up incrementally to around 80% of memory according to top). I have to restart Zope to cure the problem. Unfortunately, I have to do this on a regular basis and it is becoming quite a headache. Does anyone know what the problem might be? Thanks in advance, Ron