Maxim,
1.Verify my steps for dumping, Connect to database A: Data Administration> Admin> Dump Data and Definitions> Data Definitions (*.df file)
2.For Loading, Connect to database B: Data Administration> Admin> Load Data and Definitions> Data Definitions (*.df file)> Input file (Search for the filename and dorectory save)> Ok
3.Result: Error during ADD FIELD YEAR **, FIELD already exists with name YEAR