diff --git a/.golangci.yml b/.golangci.yml
index 2c9cdcf..073d129 100644
--- a/.golangci.yml
+++ b/.golangci.yml
@@ -221,8 +221,8 @@ linters:
     - gofmt
     - govet
     # - errcheck
-    # - staticcheck
-    # - unused
+    - staticcheck
+    - unused
     # - gosimple
     - ineffassign
     - typecheck
diff --git a/factory/factory.go b/factory/factory.go
index a8a0f15..500b2ac 100644
--- a/factory/factory.go
+++ b/factory/factory.go
@@ -12,7 +12,6 @@ package factory
 
 import (
 	"fmt"
-	"io/ioutil"
 	"os"
 
 	"gopkg.in/yaml.v2"
@@ -43,7 +42,7 @@ func init() {
 
 // TODO: Support configuration update from REST api
 func InitConfigFactory(f string) error {
-	if content, err := ioutil.ReadFile(f); err != nil {
+	if content, err := os.ReadFile(f); err != nil {
 		return err
 	} else {
 		UdrConfig = Config{}
diff --git a/service/init.go b/service/init.go
index aa616d8..cb6453f 100644
--- a/service/init.go
+++ b/service/init.go
@@ -42,8 +42,7 @@ type UDR struct{}
 type (
 	// Config information.
 	Config struct {
-		udrcfg         string
-		heartBeatTimer string
+		udrcfg string
 	}
 )
 
@@ -366,10 +365,16 @@ func (udr *UDR) UpdateNF() {
 			problemDetails.Status == 404 || problemDetails.Status == 400 {
 			//register with NRF full profile
 			nfProfile, err = udr.BuildAndSendRegisterNFInstance()
+			if err != nil {
+				initLog.Errorf("UDR register to NRF Error[%s]", err.Error())
+			}
 		}
 	} else if err != nil {
 		initLog.Errorf("UDR update to NRF Error[%s]", err.Error())
 		nfProfile, err = udr.BuildAndSendRegisterNFInstance()
+		if err != nil {
+			initLog.Errorf("UDR register to NRF Error[%s]", err.Error())
+		}
 	}
 
 	if nfProfile.HeartBeatTimer != 0 {