diff --git a/CHANGELOG.md b/CHANGELOG.md
index b2f5b6d8..1849ed0e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,14 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [6.4.2] - 2021-01-03
+
+### Fixed
+
+- N3DR does not fail if parameter is empty and not populated in
+  `~/.n3dr/config.yml` reported by
+  [der-eismann](https://github.com/der-eismann).
+
 ## [6.4.1] - 2021-01-03
 
 ### Changed
@@ -604,7 +612,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - Download all artifacts from a certain Nexus3 repository.
 
-[Unreleased]: https://github.com/030/n3dr/compare/6.4.1...HEAD
+[Unreleased]: https://github.com/030/n3dr/compare/6.4.2...HEAD
+[6.4.2]: https://github.com/030/n3dr/compare/6.4.1...6.4.2
 [6.4.1]: https://github.com/030/n3dr/compare/6.4.0...6.4.1
 [6.4.0]: https://github.com/030/n3dr/compare/6.3.0...6.4.0
 [6.3.0]: https://github.com/030/n3dr/compare/6.2.0...6.3.0
diff --git a/README.md b/README.md
index fa365ab7..7d525a64 100644
--- a/README.md
+++ b/README.md
@@ -314,7 +314,7 @@ n3dr config \
 ### Build
 
 ```bash
-docker build -t utrecht/n3dr:6.4.1 .
+docker build -t utrecht/n3dr:6.4.2 .
 ```
 
 [![dockeri.co](https://dockeri.co/image/utrecht/n3dr)](https://hub.docker.com/r/utrecht/n3dr)
@@ -324,7 +324,7 @@ docker build -t utrecht/n3dr:6.4.1 .
 ```bash
 docker run -it \
   -v /home/${USER}/.n3dr:/root/.n3dr \
-  -v /tmp/n3dr:/tmp/n3dr utrecht/n3dr:6.4.1
+  -v /tmp/n3dr:/tmp/n3dr utrecht/n3dr:6.4.2
 ```
 
 ### Upload
@@ -333,7 +333,7 @@ docker run -it \
 docker run -it \
   --entrypoint=/bin/ash \
   -v /home/${USER}/.n3dr:/root/.n3dr \
-  -v /tmp/n3dr:/tmp/n3dr utrecht/n3dr:6.4.1
+  -v /tmp/n3dr:/tmp/n3dr utrecht/n3dr:6.4.2
 ```
 
 navigate to the repository folder, e.g. `/tmp/n3dr/download*/` and upload:
diff --git a/build/package/snap/snapcraft.yaml b/build/package/snap/snapcraft.yaml
index ae370667..73374753 100644
--- a/build/package/snap/snapcraft.yaml
+++ b/build/package/snap/snapcraft.yaml
@@ -1,7 +1,7 @@
 ---
 name: n3dr
 base: core20
-version: 6.4.1
+version: 6.4.2
 summary: Nexus3 Disaster Recovery
 description: |
   Download all artifacts at once or migrate automatically from Nexus to Nexus.
diff --git a/cmd/n3dr/root.go b/cmd/n3dr/root.go
index eb6fc963..353e144c 100644
--- a/cmd/n3dr/root.go
+++ b/cmd/n3dr/root.go
@@ -116,22 +116,39 @@ func initConfig() {
 	viper.AutomaticEnv()
 }
 
+func valueInConfigFile(key string) (string, error) {
+	conf := viper.ConfigFileUsed()
+	log.Infof("%s parameter empty. Reading it from config file: '%s'", key, conf)
+	value := viper.GetString(key)
+	if value == "" {
+		return "", fmt.Errorf("key: '%s' does not seem to contain a value. Check whether this key is populated in the config file: '%s'", key, conf)
+	}
+	return value, nil
+}
+
 func parseVarsFromConfig() {
+	var err error
 	if !anonymous {
 		if n3drUser == "" {
-			log.Infof("n3drUser empty. Reading if from '%v'", viper.ConfigFileUsed())
-			n3drUser = viper.GetString("n3drUser")
+			n3drUser, err = valueInConfigFile("n3drUser")
+			if err != nil {
+				log.Fatal(err)
+			}
 		}
 
 		if n3drPass == "" {
-			log.Infof("n3drPass empty. Reading if from '%v'", viper.ConfigFileUsed())
-			n3drPass = viper.GetString("n3drPass")
+			n3drPass, err = valueInConfigFile("n3drPass")
+			if err != nil {
+				log.Fatal(err)
+			}
 		}
 	}
 
 	if n3drURL == "" {
-		log.Infof("n3drURL empty. Reading if from '%v'", viper.ConfigFileUsed())
-		n3drURL = viper.GetString("n3drURL")
+		n3drURL, err = valueInConfigFile("n3drURL")
+		if err != nil {
+			log.Fatal(err)
+		}
 	}
 }