This setting modifies the behavior of Caché when DisconnectErr is enabled. The value n may be 1 or 0:
When 1 (true), the process receives an asynchronous <DSCON> error at the time a disconnect occurs on the device. This error will occur at the next command executed. Hang commands will be interrupted.
When 0 (false) the process receives a <DSCON> error at the next read or write command.
AsyncDisconnectErr is only applicable to Telnet connections on Windows. It has no effect on any other device type or operating system. If DisconnectErr is set to 0 (false), then AsyncDisconnectErr has no effect.
0 or 1. The default is 0.
On the page System Administration > Configuration > Additional Settings > Compatibility, in the AsyncDisconnectErr row, select Edit and choose true (selected) or false (cleared).