mhonarc stopped working

The script that use mhonarc to convert email to html stopped working for
a while.

When I try it manually "mhonarc -add -rcfile .mhonarcrc < temp" (temp is
a email file), I got:

Reading database ...
Can't find string terminator "'" anywhere before EOF at ./.mhonarc.db
line 1664.

Thanks for help.

Cliff