[erlang-questions] turning up debugging on ports

[jm]

Is there an option to erl which will turn up the debugging so I can see 
what erlang is doing in relation to a port module I'm attempting to 
debug. I tried +v (verbose) but it doesn't appear to help. In particlar 
I wish to find out what the node is doing just before it closes the 
port. Any recommended reading on debugging port would also be welcomed.


Jeff.