-25324: Errors checking length of column specifications. See Loader server log file for more information 

Explanation:

Error executing the Loader command for exporting data. You can specify in your command the length of the values in the data stream for individual columns. Some of the lengths you specify may be shorter than the column lengths defined in the database. If this is the case, these values may be exported incorrectly. This error message is only a summary of the error. The error messages –25203, -25204, and -25315 specify which column descriptions contain errors and are only listed in the log file.

User Response:

Correct the command and then re-execute it.