-25343: Column name(s) or number(s) do not match column names/numbers in select list: (<column_names>) 

Explanation:

Error executing the Loader command for exporting data.

The column list contains the column names, but they are missing from the SELECT statement. These are not exported and therefore cannot be saved in the data stream.

User Response:

If you want to export these columns as well, you must include them in the SELECT statement. Otherwise delete the column names from the column list.

Execute the command again.