Enhanced GET_LU_STATUS Incorrectly Indicates SyncPoint Support (237896)

SYMPTOMS

SNA Server version 4.0 Service Pack 3 (SP3) includes an enhanced APPC GET_LU_STATUS function where it is possible to determine whether a Local APPC LU is configured with SyncPoint support. However, this new GET_LU_STATUS function may incorrectly return syncpoint = AP_YES, causing TP_STARTED (with syncpoint_rqd = AP_YES) to fail with the following error message:

primary_rc = X'0001' (AP_PARAMETER_CHECK)
secondary_rc = X'00000003' (AP_BAD_LU_ALIAS)

For more information on this function, see the following Knowledge Base article:

235406 SNA Server Support for External Attach Managers

CAUSE

GET_LU_STATUS returns syncpoint = AP_YES if the SyncPoint Support check box is enabled for a Local APPC LU, even if the client computer name field is not filled in properly, or contains a computer name that is not the same as the computer where the TP_STARTED is issued. SNA Server Manager or the MMC (and the SNACFG command line tool) should require the configuration of the client computer name field when the SyncPoint Support check box is checked for a Local APPC LU.

WORKAROUND

If a Local APPC LU is to be used with SyncPoint-enabled applications. Both the SyncPoint Support check box and the client computer name field must be configured.