Hey Guys, We built an application using PL/SQL & RLS with 10g on W2K. We just patched test database to 10.2.0.3 from 10.2.0.2 and the developers are reporting periodic errors for a single user. The session created the below trace file. There is nothing in the alert.log, there is nothing in our internal PL/SQL log table and the user is returned the error "protocol violation". Has anyone every seen this before? Metalink and other sources have given me no information. Dump file c:\oracle\admin\qabwnus\udump\qabwnus_ora_1936.trc Thu Feb 22 10:45:36 2007 ORACLE V10.2.0.3.0 - Production vsnsta=0 vsnsql=14 vsnxtr=3 Oracle Database 10g Release 10.2.0.3.0 - Production Windows 2000 Version V5.0 Service Pack 3 CPU : 2 - type 586 Process Affinity : 0x00000000 Memory (Avail/Total): Ph:463M/1535M, Ph+PgF:3499M/4577M, VA:1500M/2047M Instance name: qabwnus Redo thread mounted by this instance: 1 Oracle process number: 41 Windows thread id: 1936, image: ORACLE.EXE (SHAD) *** 2007-02-22 10:45:36.054 *** SERVICE NAME:(qabwnus.tripos.com) 2007-02-22 10:45:36.007 *** SESSION ID:(29.11497) 2007-02-22 10:45:36.007 --- PROTOCOL VIOLATION DETECTED --- sqltxt(14446B84)=BEGIN NOTEBOOK.PKG_APPL_SECURITY_MGMNT_PUBLIC.load_user(:1,:2,:3,:4); END; hash=f601a149f5958bb08a7e5b4e6a26e521 parent=1E942434 maxchild=01 plk=16C38690 ppn=n cursor instantiation=0C5922A4 used=1172162733 child#0(17FE5114) pcs=1E942638 clk=16C61190 ci=1498567C pn=1F2BC544 ctx=19C3D384 kgsccflg=0 llk[0C5922A8,0C5922A8] idx=0 xscflg=c0110676 fl2=d000008 fl3=42222008 fl4=100 kkscoacd Bind#0 oacdty=01 mxl=8192(4001) mxlc=00 mal=00 scl=00 pre=00 oacflg=03 fl2=1000010 frm=01 csi=873 siz=8192 off=0 kxsbbbfp=0c771564 bln=8192 avl=10 flg=05 value="cgalbraith" Bind#1 oacdty=102 mxl=64(64) mxlc=00 mal=00 scl=00 pre=00 oacflg=03 fl2=1000000 frm=01 csi=873 siz=192 off=0 kxsbbbfp=0b1a34a8 bln=64 avl=04 flg=05 value= Dump of memory from 0x0B1A34A8 to 0x0B1A34AC B1A34A0 0000003B [;...] Bind#2 oacdty=102 mxl=64(64) mxlc=00 mal=00 scl=00 pre=00 oacflg=03 fl2=1000000 frm=01 csi=873 siz=0 off=64 kxsbbbfp=0b1a34e8 bln=64 avl=04 flg=01 value= Dump of memory from 0x0B1A34E8 to 0x0B1A34EC B1A34E0 0000003E [>...] Bind#3 oacdty=102 mxl=64(64) mxlc=00 mal=00 scl=00 pre=00 oacflg=03 fl2=1000000 frm=01 csi=873 siz=0 off=128 kxsbbbfp=0b1a3528 bln=64 avl=04 flg=01 value= Dump of memory from 0x0B1A3528 to 0x0B1A352C B1A3520 0000003F [?...] Frames pfr 0C579094 siz=320 efr 0C579038 siz=312 kxscphp 0AC96124 siz=1000 inu=0 nps=288 kxscbhp 0B1526F4 siz=9204 inu=0 nps=8540 Thanks, Todd Carlson Manager, Database Technologies Tripos, Inc. (314) 951-3246