One of the 400 programmers stumbled upon this in one of the myriad of logs on the 400:
Severity: 70
Message....: Session stopped by a request from device QQF0AI27E3.
Cause......: The request shutdown was caused by either the user turning the power
off, by a device error, or the ASCII controller inactivity timer expired.
Recovery...: Close the files and vary the device off (VRYCFG command). If the
problem occurs again, enter the ANZPRB command to run problem analysis.
Okay. how do I figure out WTF device QQF0AI27E3 is?