replicating snapshots (multitiered materialized views)..

I think I've read through docs, but it seems like in order to accompish the following

1. create a compelx snapshot A on site A of tables A and then to
2. replicate snapshot A to snapshot B I need the following
3. a snapshot log (and PK) on snapshot A on site A
4. the refresh needs to be complete?

2 is what's confusing me, I thought the snapshot log on snapshot A would allow me to do fast refreshes, but after the snapshot A on site A refreshed, my snapshot group (which contained snapshots of snapshots) kept failing with
ORA-12034: materialized view log on "A.A" younger than last refresh Recreating the snapshot log didn't help until i refreshed complete every replicated snapshot (with dbms_snapshot.refresh('A','c')

Is this how it's supposed to work with 'multitier' snapshots? Thanks
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We use Oracle 8.1.7.4 and 9.2.0.5 on Solaris 2.7 boxes remove NSPAM to email Received on Thu Feb 10 2005 - 14:44:07 CST