DFS1598I SC=04 MIXS and MIX/MIXS WITH '`nn`' VALID ONLY FOR TYPE=SCS1

Explanation
 MIXS or MIX/MIXS'nn' was specified for a device
other than an SCS1 printer, but is valid only for the SCS1 printer.

System action
 MFS ignores the invalid keyword and continues
processing.

Programmer response
 Remove the MIXS or MIX/MIXS'nn' specification
from the DFLD statement; then rerun the job, if necessary.