[Koha] After restoring backup, rebuilding zebra index outputs many errors retrivieving biblio records and search doesn't work

[David M. Bucknell]

Dear Koha Friends,

We are running Koha 3.10.  I accidentally deleted some files and now,  
after restoring from a backup, cannot get search to work.  When we run  
zebra index, we get lots errors such as you can see below.  (Searching  
gives 0 results.)

I would be grateful for any suggestions for trouble-shooting this.

Thank you.

Sincerely,

David


Starts out alright:
$ /url//misc/migration_tools/rebuild_zebra.pl -b -r -v
Zebra configuration information
================================
Zebra biblio directory      = /url/var/lib/zebradb/biblios
Zebra authorities directory = /url/var/lib/zebradb/authorities
Koha directory              = /url/intranet/cgi-bin
BIBLIONUMBER in :     999$c
BIBLIOITEMNUMBER in : 999$d
================================
skipping authorities
====================
exporting biblio
====================
1...............................................................................101.
Ok Upto 6301.

*************
Then the errors start:
.error retrieving biblio 7515 at  
/url//misc/migration_tools/rebuild_zebra.pl line 539.

7501............................................................................7601.............................................................................................
Records exported: 7668

Have not found the answer here:  
https://lists.katipo.co.nz/public/koha/2012-July.txt

-- 
David M. Bucknell
International Knowledge Networks, Co., Ltd.
91 Sutthisan, Dindaeng, Dindaeng, Bangkok 10400 Thailand
+66 843291183
+66 26938144