Dependent LU6.2 Session Fails With Event ID 14: INITSELF

• Microsoft SNA Server for Windows NT, versions 2.0, 2.1, 2.11 Service Pack 1, and 3.0

SYMPTOMS

When an SNA Server starts a dependent LU6.2 session to a host system, the SNA Server sends an INITSELF command to solicit a BIND command from the host. If there is a configuration mismatch between the SNA Server and the host (VTAM and subsystem, such as CICS) or if the host application is temporarily unavailable, then the host sends a negative response to the INITSELF command and the SNA Server logs a sense code in the Windows NT application event log:

   Event ID: 14
   Description: APPC session activation failure: INITSELF negative response
   received.

      Sense data   = <sense code>
      Connection   = <connection name>
      LU alias     = <Local LU alias>
      PLU alias    = <Remote LU alias>
      Mode name    = <mode name>
      LU address   = <Locaddr of Local LU>

CAUSE

An APPC session fails to start because the host has rejected the SNA INITSELF request sent to initiate the session. The data contains more information about the reason for the rejection. A common sense code which may be returned if a configuration mismatch exists is "1003xxxx", where 1003 indicates "Function Not Supported" and xxxx subcode indicates the sense code specific information.

Under SNA Server versions 2.0, 2.1 and 2.11, SNA Server does not check the local dependent APPC LU name received in a host BIND command. Under these versions, SNA Server simply checks if the host BIND contains the same User Request Correlation (URC) field that SNA Server specified in the preceding INIT-SELF command. However, to correct an SNA Server Admin problem which this caused (see KB article Q140835), the SNA Server 2.11 Service Pack 1 version will now reject a host BIND request on a dependent APPC LU session if the Local APPC LU name does not match the SLU name received in the BIND. This change in behavior will only be seen if the local APPC LU name is misconfigured (i.e. if it does not match the VTAM LU macro name for the dependent APPC LU).

RESOLUTION

To correct this problem, do the following (assuming that CICS is being used):

1. The SNA Server Local APPC LU name must match the VTAM LU macro name (the LU name configured in the VTAMLST) and the CICS "Netname."

2. The SNA Server Local APPC LU network name must match the VTAM NETID.

3. The SNA Server Local APPC LU address (which is between 01-255 for dependent APPC LU's) must match the VTAM LU LOCADDR parameter.

4. The SNA Server APPC mode name must match the VTAM LU DLOGMOD name.

5. The SNA Server Remote APPC LU name and Uninterpreted LU name must match the CICS APPLID and VTAM APPLID (or ACBNAME).

6. The SNA Server Remote APPC LU network name must match the VTAM NETID where CICS is running.

MORE INFORMATION

All the Sense Codes are listed in Chapter 9 of the IBM SNA Formats Guide (IBM document GA27-3136).

For more information in configuring independent and dependent LU6.2 and APPC for different IBM platforms (including CICS, AS/400, APPC/MVS, and APPC/VM), see the Multi-Platform APPC Configuration Guide (IBM document SV40-0089). This document is available on the APPC Forum (GO APPC) in CompuServe as MPCONT.ZIP.