[BIND] db_load problem for a RR

[KMoussavi]

Hello Folks,

We were having a DNS problem on one of our servers today and I noticed the
following message in "/var/adm/messages":

#####################
Sep 17 13:22:04 proxy2.xxx.xxx.xxx named[118]: db_load could not open:
db.abc.def: No such file or directory
Sep 17 13:22:04 proxy2.xxx.xxx.xxx named[118]: db_load could not open:
db.cache: No such file or directory
#####################

The following files do exist but why am I getting these errors?

Thank you for your assistance.

Keyvan