[rrd-users] Fw: PREDICT. Answering my own question

Michel de Lange michel_de_lange at yahoo.co.uk
Tue May 10 11:24:33 CEST 2011

Yes, I do need 1.4 and the Windows binary can be downloaded here




----- Forwarded Message -----
From: Michel de Lange <michel_de_lange at yahoo.co.uk>
To: "rrd-users at lists.oetiker.ch" <rrd-users at lists.oetiker.ch>
Sent: Tuesday, 10 May 2011, 10:08
Subject: PREDICT

Hello again dear experts,

I would like to use the functionality of CDEF and PREDICT, like this:

rrdtool.exe graph test.png DEF:value=mydb.rrd:count:AVERAGE CDEF:predict=600,-2,300,value,PREDICT LINE1:var#FF0000

but I get this error here:

ERROR: invalid rpn expression in: 600,-2,300,value,PREDICT

Why would this be? I am using RRDTool 1.3.30 on Windows. Do I need to use RRDTool version 1.4? If so, is there a Windows Binary I can download?

With kind regards, and thank you for your attention,

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