MSC: Converter commandline parameter fails

Running

msceditor -m $SOURCEDIR/examples/msc/test8.msc -x test8_conv.msc

Prints the error:

bool msc::MainWindow::processCommandLineArg(shared::CommandLineParser::Positional, const QString&) Unhandled option: shared::CommandLineParser::Positional::ExportToFile "test8_conv.msc"

And no converted file is generated.