GLPDBB050E The -u switch for online backups is a required command line agument when specifing the -a parameter to set the archive directory. Use the -? option to see the syntax for the idsdbback command.

Explanation

The -a <archive dir> parameter was specified and the -u option was not. This parameter is only valid for online backups.

User response

Try again specifying the -u option along with -a.