If you are using Microsoft SNA Server Version 4 SP3 or later, please verify that DB2's SNA SPM started properly after a reboot. Check the \sqllib\<instance name>\db2diag.log file for entries that are similar to the following:
2000-04-20-13.18.19.958000 Instance:DB2 Node:000 PID:291(db2syscs.exe) TID:316 Appid:none common_communication sqlccspmconnmgr_APPC_init Probe:19 SPM0453C Sync point manager did not start because Microsoft SNA Server has not been started. 2000-04-20-13.18.23.033000 Instance:DB2 Node:000 PID:291(db2syscs.exe) TID:302 Appid:none common_communication sqlccsna_start_listen Probe:14 DIA3001E "SNA SPM" protocol support was not successfully started. 2000-04-20-13.18.23.603000 Instance:DB2 Node:000 PID:291(db2syscs.exe) TID:316 Appid:none common_communication sqlccspmconnmgr_listener Probe:6 DIA3103E Error encountered in APPC protocol support. APPC verb "APPC(DISPLAY 1 BYTE)". Primary rc was "F004". Secondary rc was "00000000".
If such entries exist in your db2diag.log, and the time stamps match your most recent reboot time, you must:
Check the db2diag.log file again to verify that the entries are no longer appended.