ah, all right, bad explanation of situation from me, sorry.
transaction isn't commited, but blocks are already inserted in the drawing...
You can find whole code in enclosure. I want to find block, which is within extents of stamp (block) and change his atribute according to dataset table. Basicly trasfer of data from *.csv file into dwg, which has already existing blocks and atributes. I do COMMIT transaction after all of atributes are changed.
Thanks