spss.Submit("DATASET DECLARE AGG.") yields a message:
|Dataset name AGG already defined.|
When I call my script more than once (the previous python process has shut down). It seems that there's some resonance in the underlying SPSS server instance. I have plans to spawn potentially hundreds of parallel SPSS jobs (on a computing cluster) via the python interface and I'm a bit concerned about whether this was a use case considered in the design.