IGW017I

Explanation
The system encountered an incorrect parameter in
the PARM field of the FILESYSTYPE statement for TYPE(HFS) in parmlib
member BPXPRMxx.
In the message text:
xxxxxxx
The specified parameter that is incorrect.
keyword
The keyword with the incorrect argument.

System action
The incorrect parameter is ignored and HFS initialization
completes using default values for initialization parameters.

Operator response
Contact the system programmer

System programmer response
Examine the parameter string near
the indicated character string for a misspelling or other error. 
Correct the error before the next time OS390 Unix System Services
is initialized.

Source
HFS Initialization