I removed the name of the image (i.e. I used ‘[file][/file]’) in the xml file for the read and write operators and the “Batch Processing” seems to work as wished. Something like:
[node id=“Read”]
[operator]Read[/operator]
…
[file][/file]
And then
[node id=“Write”]
[operator]Write[/operator]
…
[file][/file]