Microsoft® SNA Server provides a facility for resetting LUA LUs or forcing off LUA applications, which is useful if an application has become deadlocked or is looping.
The NetView command deactivate-oldlu can also be used to reset an LUA LU. These facilities interact with the LUA application as described in the following paragraphs.
When an LUA LU is reset through SNA Server or by using the deactivate-oldlu command, SNA Server sends an UNBIND message to the application (as though the host had issued it).
The UNBIND message sent to the application is 0x32 0x0E, indicating a recoverable LU failure, and is returned to the application on a subsequent RUI_READ. The LU session is terminated, but the SSCP session remains active (that is, the LU is returned to the same state as if RUI_INIT has just completed).