By default, ACKs generated using AutoAck will use the standard delimiter characters, regardless of what delimiter characters were used in the incoming message. If you wish to ensure that an ACK message uses the same delimiter characters as the message that is being acknowledged, the following Python code can be used in the Global Inbound Script:

if value[0:3] == 'MSH':
   set_separator_char(environment, 1, value[3])
   set_separator_char(environment, 2, value[4])
   set_separator_char(environment, 3, value[5])

The above code ensures that the delimiter characters used to generate the ACK are the same ones used from the incoming message.

You can download a sample VMD file that utilizes the sample code: