hi noel, 

there is fpe by taudiscriminant in rtt with 17.0.x-val rel_6:
+verbatim+
athenaeventloopmgr                                   info   ===&gt;&gt;&gt;  start processing event #396261, run #189822 177 events processed so far  &lt;&lt;&lt;===
-------------------------------------------------------------------------------------
core dump from coredumpsvc on lxbsp0914.cern.ch at sat dec  3 08:10:07 2011

caught signal 8(floating point exception). details: 
  errno = 0, code = 3 (floating point divide by zero)
  pid   = 1716547511, uid = 1818560
  value = (0, 0)
  vmem = 2376.58 mb
  rss  = 1949.65 mb
  total-ram = 23969.6 mb
  free-ram  = 83.8945 mb
  buffer-ram= 114.691 mb
  total-swap= 20481.2 mb
  free-swap = 20363.8 mb
  addr  = 0x66506fb7

event counter: 178
eventid: [run,evt,lumi,time,bunchcross,detmask] = [189822,396261,120,1316970409:18865840,1775,0xfffffffffff7]
last incident: athenaeventloopmgr:beginevent
current algorithm: taudiscriminant
algorithm stack: 
   athmasterseq
   athalgseq
   taudiscriminant
-------------------------------------------------------------------------------------

(pid=18055 ppid=18042) received fatal signal 8 (floating point exception)
signal context:
  signo  = 8, errno = 0, code = 3 (floating point divide by zero)
  pid    = 1716547511, uid = 1818560
  value  = (0, (nil))
  addr   = 0x66506fb7
  stack  = (2, 0, (nil))

  eip: 0023:66506fb7           eflags: 00210246
  eax: 00000000   ebx: 66576974   ecx: 593cdd40   edx: fff7fa28
  esi: 00000002   edi: 18bcf000   ebp: fff7fd08   esp: fff7f910
   ds: 002b        es: 002b        fs: 0000        ss: 002b

  signal esp: fff7f910  trap: 16/0  oldmask: 00000000   cr2: 00000000

  fpu:  control = ffff0372
        status  = ffffb9a4
        tag     = ffff3fff
        ip      = 0010:66506fb1
        data    = 002b:fff7f9a8
        state   = 0000b9a4
    %fp0 = [c00f:000000006400da2f]
    %fp1 = [3fe3:200026baefa9b270]
    %fp2 = [3fdb:a800eacf7c70f91b]
    %fp3 = [3ff0:5c75c9332593ab8a]
    %fp4 = [3ffc:400098d0a08ba518]
    %fp5 = [0000:0000000000000000]
    %fp6 = [4007:d488d8b9295eb796]
    %fp7 = [0000:0000000000000000]

stack trace:
 0x594867a0 athena::debugaids::stacktrace(int)+0x60 /build/atnight/localbuilds/nightlies/17.0.x-val/atlascore/rel_0/control/cxxutils/cmt/../src/sealdebug.cxx:737   + 0x60 [/afs/cern.ch/atlas/software/builds/nightlies/17.0.x-val/atlascore/rel_6/installarea/i686-slc5-gcc43-opt/lib/libcxxutils.so]
 0x594877bf athena::signal::fataldump(int, siginfo*, void*)+0xff /build/atnight/localbuilds/nightlies/17.0.x-val/atlascore/rel_0/control/cxxutils/cmt/../src/sealsignal.cxx:1397   + 0xff [/afs/cern.ch/atlas/software/builds/nightlies/17.0.x-val/atlascore/rel_6/installarea/i686-slc5-gcc43-opt/lib/libcxxutils.so]
 0x59487ad1 athena::signal::fatal(int, siginfo*, void*)+0x181 /build/atnight/localbuilds/nightlies/17.0.x-val/atlascore/rel_0/control/cxxutils/cmt/../src/sealsignal.cxx:898   + 0x181 [/afs/cern.ch/atlas/software/builds/nightlies/17.0.x-val/atlascore/rel_6/installarea/i686-slc5-gcc43-opt/lib/libcxxutils.so]
 0x5ae9b006 coredumpsvchandler::action(int, siginfo*, void*)+0x106 /build/atnight/localbuilds/nightlies/17.0.x-val/atlascore/rel_0/control/athenaservices/cmt/../src/coredumpsvc.cxx:90   + 0x106 [/afs/cern.ch/atlas/software/builds/nightlies/17.0.x-val/atlascore/rel_6/installarea/i686-slc5-gcc43-opt/lib/libathenaservices.so]
 0xffffe600 &lt;unknown function&gt;
 0x66506fb7 taudetailsmanager::update(analysis::taujet const&amp;)+0xe17 /build/atnight/localbuilds/nightlies/17.0.x-val/atlasreconstruction/rel_0/physicsanalysis/tauid/taudiscriminant/cmt/../src/taudetailsmanager.cxx:376   + 0xe17 [/afs/cern.ch/atlas/software/builds/nightlies/17.0.x-val/atlasreconstruction/rel_6/installarea/i686-slc5-gcc43-opt/lib/libtaudiscriminantlib.so]
 0x664e6549 taudiscribuilder::execute()+0x3a9 /build/atnight/localbuilds/nightlies/17.0.x-val/atlasreconstruction/rel_0/physicsanalysis/tauid/taudiscriminant/cmt/../src/taudiscribuilder.cxx:144   + 0x3a9 [/afs/cern.ch/atlas/software/builds/nightlies/17.0.x-val/atlasreconstruction/rel_6/installarea/i686-slc5-gcc43-opt/lib/libtaudiscriminantlib.so]
 0x5853c98d algorithm::sysexecute()+0x11d ??:0   + 0x11d [/afs/cern.ch/atlas/software/builds/nightlies/17.0.x-val/gaudi/rel_6/installarea/i686-slc5-gcc43-opt/lib/libgaudikernel.so]
-verbatim-
please fix the fpe and make a taudiscriminant-01-06-01-branch tag (taudiscriminant-01-06-02 violates the frozen tier-0 policy). 

thanks in advance, 
susumu 