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707: Attempt to connect to a data store that has been manually unloaded from R
The command failed.
This should be easy to resolve. A TimesTen datastore (physical database), which is what a DSN points at, has a property called its ‘ramPolicy’ The default value for this is inUse which means that TimesTen will load the datastore into memory whenever it is being used.
ttAdmin -ramload DSN_NAME
1- Oracle OTN Forum here