* First I extracted the name of the failed items from summitcopy log file:
{{{
grep "Nebulous can't " pantasks.stdout.log | grep 20100921 | sed 's/\s/\|/g' | cut -f5 -d'|' > blah
}}}

* Then I neb-moved each entry/key from the blah file to a .bak key, e.g:
{{{
neb-mv neb://ipp020.0/gpc1/20100921/o5460g0391o/o5460g0391o.ota40.fits neb://ipp020.0/gpc1/20100921/o5460g0391o/o5460g0391o.ota40.fits.bak
}}}

* I followed instructions from [wiki:Processing#Startingasingleserver Czar page] to restart summitcopy server:
ssh ipp051 as ipp user and so on...
-> The status command in summitcopy pantasks_client shows decreasing summit_copy Nrun (no Nfail) and activity for pz* scripts.

* Started registration server (from [wiki:Processing#Startingasingleserver Czar page] again)
-> Bill's script shows how things evolve in terms of exposures:
             ~bills/bin/checkexp- -v | grep exposures
  The number of exposures copied but not registered should (slowly) decrease, e.g: 
{{{
ipp@ipp004:/home/panstarrs/ipp>date ; ~bills/bin//checkexp- -v | grep exposures
Tue Sep 21 11:13:40 HST 2010
676 summit exposures since 2010-09-21
244 exposures copied but not registered
}}}
and sometimes later:
{{{
Tue Sep 21 11:16:51 HST 2010
676 summit exposures since 2010-09-21
230 exposures copied but not registered
}}}


*