Using the Database Desktop to access AS/400 table will result in an error.
This is due to an undocumented IDAPI function called by the Database Desktop and we don't expect this to be resolved in a future release.
Note that it does not make any sense to modify the structures of the AS/400 table using the Database Desktop instead of the AS/400 native tools as most of the AS/400 tables features are not directly mapped to PC equivalent.
TBatchMove has been successfully tested in a lot of situations (see MoveFile sample).
However, if the file already exists in the AS/400 you will get an execution error.
This is not the standard behavior of the TbatchMove component as it should override the existing table, however it is a pretty safe protection against wrong manipulations.