diff --git a/go.sum b/go.sum
index bd6f62f..1026877 100644
--- a/go.sum
+++ b/go.sum
@@ -8,7 +8,6 @@ golang.org/x/mod v0.3.0 h1:RM4zey1++hCTbCVQfnWeKs9/IEsaBLA8vTkd0WVtmH4=
 golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
-golang.org/x/net v0.0.0-20201021035429-f5854403a974 h1:IX6qOQeG5uLjB/hjjwjedwfjND0hgjPMMyO1RoIXQNI=
 golang.org/x/net v0.0.0-20201021035429-f5854403a974/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
 golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
@@ -16,7 +15,6 @@ golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5h
 golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
-golang.org/x/text v0.3.3 h1:cokOdA+Jmi5PJGXLlLllQSgYigAEfHXJAERHVMaCc2k=
 golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
diff --git a/inspect.go b/inspect.go
index 9bfc74a..2be0b0c 100644
--- a/inspect.go
+++ b/inspect.go
@@ -36,7 +36,6 @@ func (nrseg *nrseg) Inspect(filename string, src []byte) error {
 				if _, t := parseParams(fd.Type); !(t == TypeContext || t == TypeHttpRequest) {
 					return false
 				}
-
 				if !existFromContext(pkg, fd.Body.List[0]) {
 					nrseg.errFlag = true
 					nrseg.reportf(filename, fs, fd.Pos(), fd)
diff --git a/nrseg.go b/nrseg.go
index 8a092b2..cfbc5ff 100644
--- a/nrseg.go
+++ b/nrseg.go
@@ -18,11 +18,12 @@ import (
 var (
 	// ErrShowVersion returns when set version flag.
 	ErrShowVersion = errors.New("show version")
+	ErrFlagTrue    = errors.New("find error")
 )
 
 type nrseg struct {
 	inspectMode          bool
-	in, dist             string
+	in, dest             string
 	ignoreDirs           []string
 	outStream, errStream io.Writer
 	errFlag              bool
@@ -51,6 +52,10 @@ func fill(args []string, outStream, errStream io.Writer, version, revision strin
 	flags.StringVar(&ignoreDirs, "ignore", "", idesc)
 	flags.StringVar(&ignoreDirs, "i", "", idesc)
 
+	var destDir string
+	odesc := "destination directory."
+	flags.StringVar(&destDir, "destination", "", odesc)
+
 	if err := flags.Parse(args[1:]); err != nil {
 		return nil, err
 	}
@@ -76,6 +81,7 @@ func fill(args []string, outStream, errStream io.Writer, version, revision strin
 
 	return &nrseg{
 		in:         dir,
+		dest:       destDir,
 		ignoreDirs: dirs,
 		outStream:  outStream,
 		errStream:  errStream,
@@ -120,12 +126,12 @@ func fill2(args []string, outStream, errStream io.Writer, version, revision stri
 
 	dir := "./"
 	nargs := flags.Args()
-	if len(nargs) > 2 {
+	if len(nargs) > 1 {
 		msg := "execution path must be only one or no-set(current directory)."
 		return nil, fmt.Errorf(msg)
 	}
-	if len(nargs) == 2 {
-		dir = nargs[1]
+	if len(nargs) == 1 {
+		dir = nargs[0]
 	}
 
 	return &nrseg{
@@ -182,8 +188,8 @@ func (n *nrseg) run() error {
 				return err
 			}
 			if !bytes.Equal(org, got) {
-				if len(n.dist) != 0 && n.in != n.dist {
-					return n.writeOtherPath(n.in, n.dist, path, got)
+				if len(n.dest) != 0 && n.in != n.dest {
+					return n.writeOtherPath(n.in, n.dest, path, got)
 				}
 				if _, err := f.WriteAt(got, 0); err != nil {
 					return err
@@ -238,11 +244,12 @@ func (n *nrseg) reportf(filename string, fs *token.FileSet, pos token.Pos, fd *a
 		}
 	}
 
+	p := fs.File(pos).Position(pos)
 	if len(rcv) != 0 {
-		fmt.Fprintf(n.outStream, "%s:%d:1: %s.%s no insert segment\n", filename, fs.File(pos).Line(pos), rcv, fd.Name.Name)
+		fmt.Fprintf(n.outStream, "%s:%d:%d: %s.%s no insert segment\n", p.Filename, p.Line, p.Column, rcv, fd.Name.Name)
 		return
 	}
-	fmt.Fprintf(n.outStream, "%s:%d:1: %s no insert segment\n", filename, fs.File(pos).Line(pos), fd.Name.Name)
+	fmt.Fprintf(n.outStream, "%s:%d:%d: %s no insert segment\n", p.Filename, p.Line, p.Column, fd.Name.Name)
 }
 
 // Run is entry point.
@@ -259,7 +266,7 @@ func Run(args []string, outStream, errStream io.Writer, version, revision string
 	}
 	err = nrseg.run()
 	if nrseg.errFlag {
-		err = errors.New("find error")
+		err = ErrFlagTrue
 	}
 	return err
 }
diff --git a/nrseg_test.go b/nrseg_test.go
index 2578baa..71a774a 100644
--- a/nrseg_test.go
+++ b/nrseg_test.go
@@ -1,6 +1,8 @@
 package nrseg
 
 import (
+	"bytes"
+	"errors"
 	"io"
 	"io/ioutil"
 	"os"
@@ -10,6 +12,73 @@ import (
 	"github.com/google/go-cmp/cmp"
 )
 
+func TestNrseg_Run_Default(t *testing.T) {
+	dest := t.TempDir()
+	tests := [...]struct {
+		name string
+		want string
+		args []string
+	}{
+		{
+			name: "basic",
+			want: "./testdata/want",
+			args: []string{"nrseg", "-destination", dest, "-i", "ignore", "./testdata/input"},
+		},
+	}
+	for _, tt := range tests {
+		tt := tt
+		t.Run(tt.name, func(t *testing.T) {
+			out := &bytes.Buffer{}
+			errs := &bytes.Buffer{}
+			if err := Run(tt.args, out, errs, "", ""); err != nil {
+				t.Fatalf("run() error = %v", err)
+			}
+			validate(t, dest, tt.want)
+		})
+	}
+}
+
+func TestNrseg_Run_Inspect(t *testing.T) {
+	tests := [...]struct {
+		name string
+		want string
+		args []string
+	}{
+		{
+			name: "basic",
+			args: []string{"nrseg", "inspect", "./testdata/input"},
+			want: `testdata/input/basic.go:11:1: S.SampleMethod no insert segment
+testdata/input/basic.go:16:1: SampleFunc no insert segment
+testdata/input/basic.go:21:1: SampleHandler no insert segment
+testdata/input/ignore/must_not_change.go:11:1: MustNotChange.SampleMethod no insert segment
+testdata/input/ignore/must_not_change.go:16:1: SampleFunc no insert segment
+testdata/input/ignore/must_not_change.go:21:1: SampleHandler no insert segment
+`,
+		},
+		{
+			name: "ignoreDir",
+			args: []string{"nrseg", "inspect", "-i", "ignore", "./testdata/input"},
+			want: `testdata/input/basic.go:11:1: S.SampleMethod no insert segment
+testdata/input/basic.go:16:1: SampleFunc no insert segment
+testdata/input/basic.go:21:1: SampleHandler no insert segment
+`,
+		},
+	}
+	for _, tt := range tests {
+		tt := tt
+		t.Run(tt.name, func(t *testing.T) {
+			out := &bytes.Buffer{}
+			errs := &bytes.Buffer{}
+			if err := Run(tt.args, out, errs, "", ""); !errors.Is(err, ErrFlagTrue) {
+				t.Fatalf("want %v, but got %v", ErrFlagTrue, err)
+			}
+			if out.String() != tt.want {
+				t.Errorf("want\n%s\nbut got\n%s", tt.want, out.String())
+			}
+		})
+	}
+}
+
 func TestNrseg_run(t *testing.T) {
 	type fields struct {
 		path      string
@@ -34,10 +103,10 @@ func TestNrseg_run(t *testing.T) {
 	for _, tt := range tests {
 		tt := tt
 		t.Run(tt.name, func(t *testing.T) {
-			dist := t.TempDir()
+			dest := t.TempDir()
 			n := &nrseg{
 				in:         tt.fields.path,
-				dist:       dist,
+				dest:       dest,
 				ignoreDirs: []string{"testdata", "ignore"},
 				outStream:  tt.fields.outStream,
 				errStream:  tt.fields.errStream,
@@ -45,7 +114,7 @@ func TestNrseg_run(t *testing.T) {
 			if err := n.run(); err != nil {
 				t.Fatalf("run() error = %v", err)
 			}
-			validate(t, dist, tt.want)
+			validate(t, dest, tt.want)
 		})
 	}
 }