IEC191I

Explanation
The OPEN parameter list contains an incorrect data
control block (DCB) address.
The hexadecimal reason code explains
the error: Return Code
Explanation
1C
The execute form of the OPEN macro specifies MODE=31, but the
parameter list specifies, or defaults to, MODE=24.
20
The execute form of the OPEN macro specifies MODE=24, but the
parameter list specifies MODE=31.

In the message text: rc
The reason code.
dcb
The DCB address.

System action
The task ends.

Programmer response
If you generated the parameter list by using
the list form of the OPEN macro, change the mode specification to
be consistent on both the MF=L and MF=E forms of the OPEN macro. 
Otherwise, to have consistent modes, you may either change the form
of the parameter list or change the mode specification on the MF=E
form of the OPEN macro.

Source
DFSMSdfp

Module
IGC0001I

Routing code
11

Descriptor code
6