[Koha] Problem in search

[ahmnas]

Dear friends

i have ubuntu 12.04 and koha version 3.16.2, and when i search with some
words like education or drugs the system give me this error "Can't call
method "as_string" on an undefined value at /usr/share/koha/lib/C4/Koha.pm
line 1608."
how solve this problem it's the first time see it and i need to solve for
searching and users used system.

Ahmad Nasser
koha system administrator
future university in Egypt
mobil: +201110136090




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