command = subst(command, token_from, "' + '\"' + infile + '\"' + '");
command = subst(command, token_base, "' + '\"' + infile_base + '\"' + '");
command = subst(command, token_to, "' + '\"' + outfile + '\"' + '");
command = subst(command, token_from, "' + '\"' + infile + '\"' + '");
command = subst(command, token_base, "' + '\"' + infile_base + '\"' + '");
command = subst(command, token_to, "' + '\"' + outfile + '\"' + '");