LU 6.2 APPC Errors HIS Client to Server

[Concepts2000]

I am encountering random occurrences of an error message that appears to refer to a LAN error between the Microsoft Host Integration Server Client and the HIS Server (SNA Server 5).

However, no LAN error appears to be recorded in the Windows Event Log.

I would like to know if other forum members are encountering a similar error.

The message contents are

APPC session deactivated abnormally

Qualifier = 0005
Connection = CONNAME
LU alias = RJRBKBB
PLU alias = PRODUCTN
Mode name = PRODMODE
Session ID = F000000000000009
LFSID = 10200
Client Domain =
Client User =
Client Machine =

EXPLANATION
An APPC session has been deactivated abnormally. The qualifier listed above corresponds to one of the following:
0005 An APPC or CPIC application was running on a client machine and the client lost it's LAN session to the Host Integration Server, *or* the session was deactivated as the result of a TP_ENDED(Hard) issued at the local LU. If the problem was caused by a lost LAN session, see the client username and machine above, and capture a Microsoft Network Monitor (or similar) trace of a dropped session and provide the trace to Microsoft support personnel.