The key compression option must specify a value within the range 0 through 7.
Specifying key compression only has an effect at the time that the file is created. Specifying key compression on a file that already exists, but does not have key compression, has no effect.
Resolution:
Specify a key compression value of 0 through 7.
See the section Database Reference File Maintenance in the chapter Database Integrity for more information on the /k parameter and valid options.