Uanble to create Cache Group from Cache Administrator

Folks,
I am attempting to create a cache group from the Cache Administrator.
I have set all the data source properties and am able to login to the data source but when I attempt to create a cache group i.e. I specify the name & type of cache group, I get this message in red at the bottom saying "Gathering table information, please wait" and... that's it. Nothing happens!
I am able to move the cursor etc. but the cache group is not defined.
Anybody have any suggestions as to what I'm doing wrong? Any help would be appreciated!
keshava

You cannot have multiple root tables within one cache group. The requirements for putting tables together into one cache group are very strict; there must be one top level table (the root table) and there can optionally be multiple child tables. The child tables must be related via foreign keys either to the root table or to a child table higher in the hierarchy.
The solution for your case is to put one ofthe root tables and the child table into one cache group and the other root table into a separate cache group. If you do that you need to take care of a few things:
1. You cannot define any foreign keys between tables in different cache groups in TimesTen (the keys can exist in Oracle) so the application must enforce the referential integrity itself for those cases.
2. If you load data into one cache group (using LOAD CACHE GROUP or 'load on demand') then Timesten will not automatically load the corresponding data into the other cache group (sicne it does not know about the relationship). The application will need to load the data into the other cache group explicitly.
There are no issues regarding transactional consistency when changes are pushed to Oracle. TimesTen correctly maintains and enforces transactional consistency regardless of how tables are arranged in cache groups.
Chris

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================================================
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