diff --git a/net/ghttp/ghttp_z_unit_issue_test.go b/net/ghttp/ghttp_z_unit_issue_test.go
index 92f761ce9..ee21a906e 100644
--- a/net/ghttp/ghttp_z_unit_issue_test.go
+++ b/net/ghttp/ghttp_z_unit_issue_test.go
@@ -726,3 +726,33 @@ func Test_Issue4093(t *testing.T) {
 		t.Assert(client.PostContent(ctx, "/test"), `{"page":1,"pageSize":10,"pagination":true,"name":"john","number":1}`)
 	})
 }
+
+// https://github.com/gogf/gf/issues/4193
+func Test_Issue4193(t *testing.T) {
+	type Req struct {
+		g.Meta `method:"post" mime:"multipart/form-data"`
+		File   *ghttp.UploadFile `v:"required" type:"file"` // File is required
+	}
+	type Res struct{}
+
+	s := g.Server(guid.S())
+	s.BindMiddlewareDefault(ghttp.MiddlewareHandlerResponse)
+	s.BindHandler("/upload", func(ctx context.Context, req *Req) (res *Res, err error) {
+		return
+	})
+	s.SetDumpRouterMap(false)
+	s.SetAccessLogEnabled(false)
+	s.SetErrorLogEnabled(false)
+	s.Start()
+	defer s.Shutdown()
+	time.Sleep(100 * time.Millisecond)
+
+	gtest.C(t, func(t *gtest.T) {
+		client := g.Client()
+		client.SetPrefix(fmt.Sprintf("http://127.0.0.1:%d", s.GetListenedPort()))
+		content := client.PostContent(ctx, "/upload", g.Map{
+			"file": "",
+		})
+		t.Assert(content, `{"code":51,"message":"The File field is required","data":null}`)
+	})
+}
diff --git a/util/gconv/gconv_scan.go b/util/gconv/gconv_scan.go
index 8d8724208..da3fcc431 100644
--- a/util/gconv/gconv_scan.go
+++ b/util/gconv/gconv_scan.go
@@ -18,7 +18,7 @@ package gconv
 // TODO: change `paramKeyToAttrMap` to `ScanOption` to be more scalable; add `DeepCopy` option for `ScanOption`.
 func Scan(srcValue any, dstPointer any, paramKeyToAttrMap ...map[string]string) (err error) {
 	option := ScanOption{
-		ContinueOnError: true,
+		ContinueOnError: false,
 	}
 	if len(paramKeyToAttrMap) > 0 {
 		option.ParamKeyToAttrMap = paramKeyToAttrMap[0]
diff --git a/util/gconv/internal/converter/converter_convert.go b/util/gconv/internal/converter/converter_convert.go
index 33ea78c28..bd0c19863 100644
--- a/util/gconv/internal/converter/converter_convert.go
+++ b/util/gconv/internal/converter/converter_convert.go
@@ -395,7 +395,11 @@ func (c *Converter) doConvertForDefault(in doConvertInput, option ConvertOption)
 		}
 
 		// custom converter.
-		dstReflectValue, ok, err := c.callCustomConverterWithRefer(fromReflectValue, referReflectValue)
+		var (
+			ok              bool
+			dstReflectValue reflect.Value
+		)
+		dstReflectValue, ok, err = c.callCustomConverterWithRefer(fromReflectValue, referReflectValue)
 		if err != nil {
 			return nil, err
 		}
@@ -415,7 +419,7 @@ func (c *Converter) doConvertForDefault(in doConvertInput, option ConvertOption)
 		switch referReflectValue.Kind() {
 		case reflect.Ptr:
 			// Type converting for custom type pointers.
-			// Eg:
+			// Example:
 			// type PayMode int
 			// type Req struct{
 			//     Mode *PayMode
diff --git a/util/gconv/internal/converter/converter_float.go b/util/gconv/internal/converter/converter_float.go
index 21418100d..bd54af2c2 100644
--- a/util/gconv/internal/converter/converter_float.go
+++ b/util/gconv/internal/converter/converter_float.go
@@ -45,7 +45,11 @@ func (c *Converter) Float32(any any) (float32, error) {
 			}
 			return 0, nil
 		case reflect.String:
-			f, err := strconv.ParseFloat(rv.String(), 32)
+			s := rv.String()
+			if s == "" {
+				return 0, nil
+			}
+			f, err := strconv.ParseFloat(s, 32)
 			if err != nil {
 				return 0, gerror.WrapCodef(
 					gcode.CodeInvalidParameter, err, "converting string to float32 failed for: %v", any,
@@ -68,6 +72,9 @@ func (c *Converter) Float32(any any) (float32, error) {
 			if err != nil {
 				return 0, err
 			}
+			if s == "" {
+				return 0, nil
+			}
 			v, err := strconv.ParseFloat(s, 32)
 			if err != nil {
 				return 0, gerror.WrapCodef(
@@ -112,7 +119,11 @@ func (c *Converter) Float64(any any) (float64, error) {
 			}
 			return 0, nil
 		case reflect.String:
-			f, err := strconv.ParseFloat(rv.String(), 64)
+			s := rv.String()
+			if s == "" {
+				return 0, nil
+			}
+			f, err := strconv.ParseFloat(s, 64)
 			if err != nil {
 				return 0, gerror.WrapCodef(
 					gcode.CodeInvalidParameter, err, "converting string to float64 failed for: %v", any,
@@ -135,6 +146,9 @@ func (c *Converter) Float64(any any) (float64, error) {
 			if err != nil {
 				return 0, err
 			}
+			if s == "" {
+				return 0, nil
+			}
 			v, err := strconv.ParseFloat(s, 64)
 			if err != nil {
 				return 0, gerror.WrapCodef(
diff --git a/util/gconv/internal/converter/converter_map.go b/util/gconv/internal/converter/converter_map.go
index aff383938..46690c2a6 100644
--- a/util/gconv/internal/converter/converter_map.go
+++ b/util/gconv/internal/converter/converter_map.go
@@ -88,6 +88,9 @@ func (c *Converter) doMapConvert(
 	value any, recursive RecursiveType, mustMapReturn bool, option MapOption,
 ) (map[string]any, error) {
 	if value == nil {
+		if mustMapReturn {
+			return map[string]any{}, nil
+		}
 		return nil, nil
 	}
 	// It redirects to its underlying value if it has implemented interface iVal.
@@ -119,6 +122,10 @@ func (c *Converter) doMapConvert(
 				return nil, err
 			}
 		} else {
+			if len(r) == 0 && mustMapReturn {
+				return map[string]any{}, nil
+			}
+			// if r is not empty, which means it fails converting to map.
 			return nil, nil
 		}
 	case []byte:
@@ -128,6 +135,10 @@ func (c *Converter) doMapConvert(
 				return nil, err
 			}
 		} else {
+			if len(r) == 0 && mustMapReturn {
+				return map[string]any{}, nil
+			}
+			// if r is not empty, which means it fails converting to map.
 			return nil, nil
 		}
 	case map[interface{}]interface{}:
@@ -328,6 +339,7 @@ func (c *Converter) doMapConvert(
 				return m, nil
 			}
 			return nil, nil
+
 		default:
 			return nil, nil
 		}
diff --git a/util/gconv/internal/converter/converter_struct.go b/util/gconv/internal/converter/converter_struct.go
index 1a84e41b6..f5b324201 100644
--- a/util/gconv/internal/converter/converter_struct.go
+++ b/util/gconv/internal/converter/converter_struct.go
@@ -160,10 +160,11 @@ func (c *Converter) Struct(params, pointer any, option ...StructOption) (err err
 			return err
 		}
 		if paramsMap == nil {
+			// fails converting params to map, it so cannot be converted to struct pointer.
 			return gerror.NewCodef(
 				gcode.CodeInvalidParameter,
-				`convert params from "%#v" to "map[string]any" failed`,
-				params,
+				`convert params "%v" to "%s" failed`,
+				params, pointerReflectValue.Type(),
 			)
 		}
 	}
@@ -505,8 +506,7 @@ func (c *Converter) bindVarToReflectValue(structFieldValue reflect.Value, value
 	case reflect.Struct:
 		// Recursively converting for struct attribute.
 		if err = c.Struct(value, structFieldValue, option); err != nil {
-			// Note there's reflect conversion mechanism here.
-			structFieldValue.Set(reflect.ValueOf(value).Convert(structFieldValue.Type()))
+			return err
 		}
 
 	// Note that the slice element might be type of struct,
@@ -637,6 +637,8 @@ func (c *Converter) bindVarToReflectValue(structFieldValue reflect.Value, value
 			elem := item.Elem()
 			if err = c.bindVarToReflectValue(elem, value, option); err == nil {
 				structFieldValue.Set(elem.Addr())
+			} else {
+				return err
 			}
 		} else {
 			// Not empty pointer, it assigns values to it.