singlefile command line option is not working

[ejjp]

There is no problem creating a single html file export of a full notebook using Zim 0.65 GUI:

File -> export -> complete notebook -> Forward -> format: html -> template: ZeroFiveEight -> Forward
-> Export all pages to a single file -> exported_file.html

However, using the command line to export one html file as above, for example:

zim --export -s -O --template=ZeroFiveEight -o OUTPUTDIRECTORY NOTEBOOK

it generates a no single file html export (a lot of html files and folders).

I think that the '-s' option is not working in command line mode.