Linelog fails when attribute does not exist

[R3DNano]

I'm tryin to implement linelog so I can send information to a remote syslog
server.
It seems to work perfectly unless I try to send an attribute that is not
defined or used at the time.
For this reason, the linelog module fails to send any data.
Is there any way to make it default to something else like an empty value
so it does not crash instead?
Regards