-25311: No Data for NOT NULL - column without default (<column_name>). You have either not specified this column in the command or there is no data in the data file for this column 

Explanation:

Error in the Loader command for importing data. This error occurs if, for a column that has been defined as NOT NULL and that has no system default value, no data is found in the data stream, or if the column is not specified in the command.

User Response:

Correct the values or the command and re-execute the command.