I have an application that creates a upnp port forwarding rule, it works fine.

when I run it twice, it attemps to check to see if the port mapping is there, if it is, it removes it and adds a new one, assuming the destination ip has changed.

but the "DeletePortMapping" behavior is weird.

if I add a port mapping, it is successful and is immediately shown in the nat forwarding->upnp page.

when I go to delete the port mapping, the first time, I get no error back, presumably this means it worked. But refreshing the upnp page, still shows the port mapping there.

if I then go to delete it again, I get an error: {faultcode=s:Client, faultstring=UPnPError, errorDescription=NoSuchEntryInArray, errorCode=714}

yet the port mapping entry remains on the upnp page. I've tried logging out of the router's administration page and back in, and the entries are still there.

it acts like it is working correctly, but the upnp page, never seems to show entries actually being deleted, even though it says it is.

I'n afraid that entries will keep piling up and eventually cause some kind of overflow or hit some limit in the router's upnp list.