Variable link name

[Hervé Donati <herve.donati@xxxxxxxxxx>]

Hello,

My purpose is to create a map for VMware virtualization.
As an example, let us say that we have 2 ESX called "esx1" and "esx2" 
and one VM called "vm". These are nodes in my map.
This VM is sometimes moved from one ESX to the other.
One data source (no_vm) is able to give me the current esx's number, 1 or 2.
I would like to make the link change when current esx changes.
I tried something like :

LINK esx-vm
    WIDTH 2
    OUTCOMMENT esx{link:this:bandwidth_in}
    TARGET gauge:/var/www/html/cacti08/rra/vcenter_no_vm_12281.rrd:no_vm:-
    NODES vm esx{link:this:bandwidth_in}

But get :

Unknown node 'esx{link:this:bandwidth_in}' on line 206 of config

I also tried variable width (in fact 0 or no_vm), same kind of error.
If I try NODES vm esx1 with the OUTCOMMENT like upwards, the OUTCOMMENT 
is OK on the map (ie esx1 ou esx2)...
Is there a way to realize this ? I know it is not something very usual...

Thanks in advance