[rrd-users] no NaN values in perl?

[Karl Fischer]

Hello all,

I'm new to this list and fairly new to using rrdtool.

I found it quite useful to be able to store undefined 'NaN'
values beneath numeric values in the rrd ...
(eg. to differentiate between system offline and 0-value)

Works great when using rrdtool as a standalone, however, when
using RRDs::fetch in perl, all NaN values get converted into
'0' when fetching values from the RRDB.

Why? Am I doing anything wrong?

I've tried to search the archives for hints and found many
people complaining about NaN - however, I do want to get them.

My apologies if this has been asked before - please point me
to some documentation about this - if there's any.

Many thanks for your help.

Rgds

- Karl