DROP ERROR TABLES in Teradata

For MultiLoad there will no default name for log table. It will be specified inside the MLOAD script.
You can find other tables WT/ET/UV using:
SELECT * FROM 
dbc.TablesV
WHERE 
RequestText LIKE 'MLOAD%'

To know about historical load details, you can find through
SELECT * FROM dbc.QryLogV WHERE StatementGroup = 'Other MLoad'

Dropping error tables:
Once you find the required WT/ET/UV tables in the above query, you can drop by DROP TABLE command. Please remember to use the database while dropping the tables.
Example:
DROP TABLE db.WT_tablename;
DROP TABLE db.ET_tablename;
DROP TABLE db.UV_tablename;
DROP TABLE db.LT_tablename;