transform strange behaviour

Hi All,

i'm traing to change summary of some events generated by cisco trap: "topologyChange".

I added to the summary the name of interface in this way:

evt.summary = evt.summary + ' - Interface ' + evt.ifName

and it work fine.

Then i tried to add also the vlan number involved in "topologyChange"

evt.summary = evt.summary + ' - Interface ' + evt.ifName + ' - vlan ' + evt.vtpVlanIndex

using this nothing happend a no one event appears in events page.

Then i tried something easier:

evt.summary = evt.summary + evt.vtpVlanIndex

but still nothing at all, no one event in the events page.

Then the last one, i tried this:

evt.summary = evt.vtpVlanIndex

And it works! But of course i don't want to have an event with only a number as a summary.

If i try this:

evt.summary = "Vlan: " + evt.vtpVlanIndex

it doesn't work.

I had also tried this:

vlan = evt.vtpVlanIndex

evt.summary = "Vlan: " + vlan

but still nothing.

Why does evt.vtpVlanIndex seem to not work in summary if i put it with other "words" and why does evt.ifName work in any condition?

Thanks

Ale