diff --git a/proto/service.pb.go b/proto/service.pb.go
index 5d9a828..999f783 100644
--- a/proto/service.pb.go
+++ b/proto/service.pb.go
@@ -224,6 +224,8 @@ type Error struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
+
+	Msg string `protobuf:"bytes,1,opt,name=msg,proto3" json:"msg,omitempty"`
 }
 
 func (x *Error) Reset() {
@@ -258,6 +260,13 @@ func (*Error) Descriptor() ([]byte, []int) {
 	return file_service_proto_rawDescGZIP(), []int{4}
 }
 
+func (x *Error) GetMsg() string {
+	if x != nil {
+		return x.Msg
+	}
+	return ""
+}
+
 var File_service_proto protoreflect.FileDescriptor
 
 var file_service_proto_rawDesc = []byte{
@@ -275,26 +284,27 @@ var file_service_proto_rawDesc = []byte{
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+	0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
diff --git a/proto/service.proto b/proto/service.proto
index 57a05e9..978332f 100644
--- a/proto/service.proto
+++ b/proto/service.proto
@@ -69,5 +69,5 @@ message SaveResponse {};
 // Error — сообщение об ошибке
 // Возвращается при возникновении ошибок в методах сервиса Config
 message Error {
-
+    string msg = 1;
 }
\ No newline at end of file
diff --git a/service.go b/service.go
index e7d3c98..b75c816 100644
--- a/service.go
+++ b/service.go
@@ -46,8 +46,21 @@ func (c *serviceConfig) Init(opts ...config.Option) error {
 		}
 	}
 
+	if c.opts.Codec == nil {
+		err := fmt.Errorf("missing Codec option")
+		if !c.opts.AllowFail {
+			return err
+		}
+
+		if err := config.DefaultAfterInit(c.opts.Context, c); err != nil && !c.opts.AllowFail {
+			return err
+		}
+
+		return nil
+	}
+
 	if cli == nil {
-		err := fmt.Errorf("missing client option")
+		err := fmt.Errorf("missing Client option")
 		if !c.opts.AllowFail {
 			return err
 		}