RTFM, see below:

Nwwaitonerror

The nwwaitonerror option specifies that the client program responds in one of 
the following ways, if an error occurs while exiting: 

Display an error message and wait before returning to the NetWare console. 

Return immediately to the NetWare console. 
Note: You can exploit the nwwaitonerror option when running DSMC in an 
automated mode, such as, from an .NCF file. By default, you are asked to press 
any key to continue before you exit the DSMC program. If you specify yes, DSMC 
will not post this prompt.  

Syntax 

>>-NWWaitonerror----+ .-Yes--.------+-----------------------------------><
                    '-No---'

Parameters 

Yes 
Specifies that the client program displays an error message if it encounters an 
error. Press Enter to return to the NetWare console. This is the default. 

No 
Specifies that the client program returns immediately to the NetWare console if 
it encounters an error while exiting. An error message is not displayed. 
Examples 

Options file: 
nww yes 

Command line: 
Does not apply.