My thanks to Thomas SteinMaurer, who helped me to get this stuff working.

The problem with 2. scope (different transactions) was in transaction settings.
I used default isolation level - "tiConcurrency".
The solutions was to set TIB_Transaction components "tiCommitted".

Maybe it would be wise to include it also into the DML Caching helpfile?

Riho-Rene Ellermaa
senior programmer
Hansabank