[Koha] Regardng Koha search

[Dibyendra Hyoju]

Hi all,

I upgraded the Koha database recently from 3.6 to 3.14 and again into
3.16. Koha is showing errors (mentioned below) during the search,
maybe because of the upgrade, I guess.

Software error: Can't call method "as_string" on an undefined value at
/usr/share/koha/lib/C4/Koha.pm line 1608.

Some of the keywords I used during the search are: account, business
and accounting but while other keywords don't have problem.

Any idea how to resolve this problem?

Thank you.

-- 
Dibyendra Hyoju