Symptoms
SNA Server or Host Integration Server 2000 systems being used to distribute DLC 802.2 link services for use by branch SNA Servers and/or Host Integration 2000 servers in a Distributed Link Service (DLS) environment may experience an application exception in Snalink!UpdateDLSData.
NOTE: The problem only occurs when a DLS connection terminates unexpectedly. Therefore, the Application Event log may contain events normally associated with connection outages prior to the application exception. Common connection outage events logged by SNA Server/HIS 2000 include the following events: 23, 227, 226.
Resolution
The application exception occurs when a NULL message pointer is passed into the UpdateDLSData function.