Startsap error code 12 after oracle patch updation frm10.2.0.2 to 10.2.0.4

Question

After applying oracle patch 10.2.0.4 on SUN 10 platform, startsap gives a error code 12. I am able to start the database but the startsap does not work. This is happening for all our systems for which we upgraded the oracle patch. R3trans -d also gives the same error. Trans.log says invalid user/password but we have not changed any password of any oracle user. In fact we are able to login to sqlplus using system and our old password. Any pointers would be higly appreciated.
Regards
Gokul

Answer 1

SAPUSER table was missing and OPS$SIDADM user was also missing. Now I am able to do sqlplus /@QGR but the problem persists . R3trans -d out is
4 ETW000
     196  0.703592
4 ETW000  [dev trc     ,00000]  Assigning server context 0x10190b258 to service
context 0x101908f68
4 ETW000
  105312  0.808904
4 ETW000  [dev trc     ,00000]  Assigning username to user session 0x101969140
     158  0.809062
4 ETW000  [dev trc     ,00000]  Assigning password to user session 0x101969140
     143  0.809205
4 ETW000  [dev trc     ,00000]  Starting user session (con_hdl=0,svchp=0x101908f
68,srvhp=0x10190b258,usrhp=0x101969140)
4 ETW000
     627  0.809832
4 ETW000  [dboci.c     ,00000]  *** ERROR => OCI-call 'OCISessionBegin' failed w
ith rc=1034
4 ETW000
   14742  0.824574
4 ETW000  [dev trc     ,00000]  server_detach(con_hdl=0,stale=1,svrhp=0x10190b25
8)
4 ETW000
     170  0.824744
4 ETW000  [dev trc     ,00000]  Detaching from DB Server (con_hdl=0,svchp=0x1019
08f68,srvhp=0x10190b258)
4 ETW000  [dev trc     ,00000]  Assigning username to user session 0x101969140
     158  0.809062
4 ETW000  [dev trc     ,00000]  Assigning password to user session 0x101969140
     143  0.809205
4 ETW000  [dev trc     ,00000]  Starting user session (con_hdl=0,svchp=0x101908f
68,srvhp=0x10190b258,usrhp=0x101969140)
4 ETW000
     627  0.809832
4 ETW000  [dboci.c     ,00000]  *** ERROR => OCI-call 'OCISessionBegin' failed w
ith rc=1034
4 ETW000
   14742  0.824574
4 ETW000  [dev trc     ,00000]  server_detach(con_hdl=0,stale=1,svrhp=0x10190b25
8)
4 ETW000
     170  0.824744
4 ETW000  [dev trc     ,00000]  Detaching from DB Server (con_hdl=0,svchp=0x1019
08f68,srvhp=0x10190b258)
4 ETW000
     179  0.824923
4 ETW000  [dev trc     ,00000]  Deallocating server context handle 0x10190b258
     573  0.825496
4 ETW000  [dbsloci.    ,00000]  *** ERROR => CONNECT failed with sql error '1034
4 ETW000
     191  0.825687
4 ETW000  [dev trc     ,00000]     set_ocica() -> OCI or SQL return code 1034
     112  0.825799
4 ETW000  [dblink      ,00431]  ***LOG BY2=>sql error 1034   performing CON [dbl
ink#5 @ 431]
4 ETW000
     565  0.826364
4 ETW000  [dblink      ,00431]  ***LOG BY0=>ORA-01034: ORACLE not available
     131  0.826495
4 ETW000                        ORA-27101: shared memory realm does not exist
4 ETW000                        SVR4 Error: 2: No such file or directory [dblink
#5 @ 431]
2EETW169 no connect possible: "DBMS = ORACLE                           --- dbs_o
ra_tnsname = 'QGR'"