Hello,
I have a different way of doing the same thing. See script extract_pt.py available in
pputils. It works something like:
extract_pt.py -i in.slf -x 100.0 -y 200.0 -o out.txt
where -i is the *.slf result file, -x and -y are coordinates, and -o is the output file. It gives time series output (for all variables) of the node closest to the one given in the arguments. It's not the fastest or the most efficient script, but it should work.
Best regards,
Pat