How to check if zebra (Z39.50) search engine

If you index QAI example records
http://www.indexdata.com/zebra/doc/tutorial.html#tutorial-oai

then
http://www.indexdata.com/zebra/doc/tutorial-oai-sru-pqf.html
----------- quote ------
access the 6th to the 10th record using the URL
http://localhost:9999/?version=1.1&operation=searchRetrieve&x-pquery=the&startRecord=6&maximumRecords=5&recordSchema=dc 

when i try to search for record i get following error:

Can't call method "title" without a package or object reference at /usr/share/koha/intranet/cgi-bin/cataloguing/addbiblio.pl line 899.

as you know Zebra is a routing daemon, like RIP, OSPF, the question is WHY DO WE NEED zebra ro koha library system, I am looking into search engine not Routing protocal, what is the relation between z3950 and Zebra, I AM confiused, i don't even know what is a reason of having zebra under KOHA library system???

Correction. There are multiple products called Zebra.
For search engine, Zebra is a high-performance, general-purpose structured text indexing and retrieval engine.
https://www.indexdata.com/zebra

Here is the the online documentation for Zebra
https://www.indexdata.com/zebra/doc/

> Can't call method "title" without a package or object reference at
 Please post line 880 - 910 of /usr/share/koha/intranet/cgi-bin/cataloguing/addbiblio.pl
here.

Also attach /usr/share/koha/intranet/cgi-bin/cataloguing/addbiblio.pl
in this question. So perl expert here can help you.

My suspicion is that either some perl modules are missing or installed improperly.

thanks wesly_chen, i have solved this with your support