The txt2tags built-in command-line expects to receive the full command
line as a list of tokens, except the very first item. Examples:

txt2tags --help ---> ['--help']

txt2tags -t html -i sample.t2t ---> ['-t', 'html', '-i', 'sample.t2t']

To make things easier, you can use split to create the list:

'-t html -i sample.t2t'.split()
txt2tags wrote samples/sample.html #"e:\\" for minisd card on the e61
"c:\\" for phone memory
Txt2tags will write the converted file in the same folder as the *.t2t file.

Kind Regards, Nicholas