Has somebody detected a problem with snmpCollect?

I've configured the data collection with some mibs (ifInOctect, etc)
pointing to a NetView collection every hour. It works well, but
sometimes snmpCollect stops collection, without any explicity messages,
and it passes 2 o 3 days stopped. The daemon is running, but doesn't
collect data.

is a detected problem?

Thanks in advance.

    Josi Luis.