i have system running on koha 3.6.4 with no zebra

suddenly message appear when we are saving bib records

the message 

Software error:

Can't call method "as_usmarc" on an undefined value at /usr/share/koha/lib/C4/Search.pm line 2524.

did any one faced this error before 

i need to solve this problem

thanks for your help

Mohamed El Zalabany
Integrated library systems consultant


mh_zalabany@hotmail.com
Mobile: 0111291444