[Koha] search not working (zebra error) ??!

[abdallah abdelsalam]

Hi

I use Koha version 3.00.00.094

search does not give results(It gives results before)
but i don't know what happened
When making rebuild zebra(migration_tools/rebuild_zebra.pl -b -a -w)
This error appears


20:16:43-23/04 zebraidx(22731) [fatal] Node node_zebra missing
20:16:43-23/04 zebraidx(22731) [warn] Cannot obtain EXPLAIN information
20:16:43-23/04 zebraidx(22731) [fatal] zebra_begin_trans: cannot open
register

any help??