Pluggable mappings - how to get them to work (OWB 10gR2)

Hi,
I'm trying to create some pluggable mappings that I can share between a dimension and fact load. For example, I want to take my incoming data and do some set of operations on it (nothing too complex, all just a basic "expression" operator). I need to exactly duplicate this code between a dimension mapping (to generate dimension values), and a cube load (so OWB can look up the proper surrogate keys).
Therefore, to make sure the logic stays 100% the same between the dim and fact loads, I'd like to use pluggable mappings. Then if I change the logic for the pluggable mapping, it automatically updates both the dim and fact load (and makes the logic 100% accurate between the dim and fact load ETL jobs)
The problem I'm running in to is this: everything works 100% ok in the dimension load, where basically the pluggable mapping feeds directly into a single target operator, and that target operator has no other inputs.
However, in the fact load, I can't get pluggable mappings to work (at all). The only difference is that, in the fact load, I have data from both the pluggable mapping AND from other sources going into a single operator (AGGREGATOR in my case). Those "other sources" are all the other dimensions that don't have pluggable mappings, plus the numeric fact columns.
When I try to connect the pluggable mapping to the AGGREGATORI get the following error message:
"API8003: Connection target attribute group is already connected to an incompatible data source. Use a Joiner or Set operator to join the upstream data first before connecting it to this operator"
I'm not sure how to resolve this. A "joiner" won't help - if I have 10 dimensions coming in to an aggregator, and I'm processing 50 million rows, I sure can't try to add suitable join fields to each dimension and then try to join ten 50 million row sets. And a Set operator doesn't help at all either.
Any way for me to get around this?
Thanks,
Scott

Hi everyone,
I have attempted to use pluggable mappings because i have a source system with 30 similar tables that need similar transformations (and extraction operations) performed on them. At the moment there is only a business need in our DW environment for 3 of them, and I have created 3 mappings using a common (nested) pluggable mapping. I have found the functionality "flaky". My two specific concerns are that the design centre sometimes doesnt update the mapping that uses the pluggable mapping (the code generated doesnt include the newly updated PM code). Concern 2 is that sometimes I cant even add PM's to the design canvas. I haven't rigorously attempted to solve these problems yet (because they arent a priority yet) but I AM going to watch this thread with interest.
Gene

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