diff --git a/cmd/netintcheck.go b/cmd/netintcheck.go
index 5fdf9ca..2f548f6 100644
--- a/cmd/netintcheck.go
+++ b/cmd/netintcheck.go
@@ -105,7 +105,10 @@ func networkInterfaceCheck(snmpVersion string, cmd *cobra.Command, args []string
 	asExp := false
 	err = file.CheckFileExist(file.DevicePath, "index.json")
 	if err == nil {
-		asExp = file.AsExp(file.DevicePath, "index.json", time.Duration(indexFileExp)*time.Minute)
+		asExp, err = file.AsExp(file.DevicePath, "index.json", time.Duration(indexFileExp)*time.Minute)
+		if err != nil {
+			sknchk.Unknown(fmt.Sprintf("Error while accessing Index file : %v", err), "")
+		}
 		if asExp {
 			log.Debugln("Regeneration of the file...")
 		}
diff --git a/file/file.go b/file/file.go
index 37770e5..256b4a7 100644
--- a/file/file.go
+++ b/file/file.go
@@ -57,12 +57,12 @@ func CreatePath(fPath string) error {
 }
 
 //AsExp check if the file is older than the given expiration duration
-func AsExp(devicePath string, filename string, exptime time.Duration) bool {
+func AsExp(devicePath string, filename string, exptime time.Duration) (bool, error) {
 	log.Debugln("===== File expiration check =====")
 	file, err := os.Stat(path.Join(devicePath, filename))
 	log.Debugf("Tested file : %v", path.Join(devicePath, filename))
 	if err != nil {
-		return false
+		return false, err
 	}
 	log.Debugf("Expiration delay : %v", exptime)
 	modifiedtime := file.ModTime()
@@ -71,10 +71,10 @@ func AsExp(devicePath string, filename string, exptime time.Duration) bool {
 	log.Debugf("Last modification time : %s ago", elapsed)
 	if elapsed > exptime {
 		log.Debugln("The file have expired")
-		return true
+		return true, nil
 	}
 	log.Debugln("The file haven't expired")
-	return false
+	return false, nil
 }
 
 //CreateJSONFile will create a json file bases on the interface{} datas.