$cli_handler_class->can('string_param_file_mapping');
my ($subcmd, $def, undef, undef, $cmdstr) = resolve_cmd($cmd);
- die "no such command '$cmd->[0]'\n" if !defined($def) && ref($cmd) eq 'ARRAY';
+ $abort->("unknown command '$cmdstr'") if !defined($def) && ref($cmd) eq 'ARRAY';
my $generate;
$generate = sub {