string command = conv.command;
command = subst(command, token_from, quoteName(infile2));
command = subst(command, token_base, quoteName(from_base));
command = subst(command, token_to, quoteName(outfile2));
string command = conv.command;
command = subst(command, token_from, quoteName(infile2));
command = subst(command, token_base, quoteName(from_base));
command = subst(command, token_to, quoteName(outfile2));