diff --git a/README.MD b/README.MD
index c16ff0d..3be5cda 100644
--- a/README.MD
+++ b/README.MD
@@ -26,6 +26,12 @@ Log levels:
  5 | Fatal
  6 | No logging
 
+Exit Codes:
+ 1 Dependencies not met
+ 2 Invalid Argument
+ 3 Source Unreachable
+ 4 Destination Unreachable
+
 ```
 
 ## Licence
diff --git a/music-sync.sh b/music-sync.sh
index 5617d73..7a8dcdf 100755
--- a/music-sync.sh
+++ b/music-sync.sh
@@ -16,6 +16,7 @@ GetOptions() {
 		VerboseOutput 5 "\`getopt --test\` failed"
 		VerboseOutput 5 "Sorry, It seems that your shell is not supported"
 		VerboseOutput 5 "If you're using MacOS or another unix-like system, please install GNU getopt"
+		ExecTime
 		exit 1
 	fi
 	
@@ -93,6 +94,7 @@ Usage() {
 	echo " -d, --dest <destination>  The destionation folder of the music"
 	echo " -v, --verbose <0-6>       Set log level"
 	echo " -h, --help                Display this help text"
+	echo ""
 	echo "Log levels:"
 	echo " 0 | Verbose"
 	echo " 1 | Debug"
@@ -102,6 +104,12 @@ Usage() {
 	echo " 5 | Fatal"
 	echo " 6 | No logging"
 	echo ""
+	echo "Exit Codes:"
+	echo " 1 Dependencies not met"
+	echo " 2 Invalid Argument"
+	echo " 3 Source Unreachable"
+	echo " 4 Destination Unreachable"
+	echo ""
 }
 
 VerboseOutput() {
@@ -156,6 +164,12 @@ ConvertFiles() {
 	mkdir -p /tmp/converted
 	while read -r line
 	do
+		if [[ ! -f "${source}/$file" ]]; then
+			VerboseOutput 5 "Source-file ${source}/$file Unreachable"
+			ExecTime
+			exit 3
+		fi
+
 		VerboseOutput 1 "Converting: $line"
 		if [[ "/tmp/converted/$line" = */* ]]; then
 			mkdir -p "/tmp/converted/${line%/*}";
@@ -174,8 +188,17 @@ CopyFiles() {
 	while read -r line
 	do
 		if [[ ! -f "$dest" ]]; then
-			VerboseOutput 5 "Destination not reachable (anymore)"
-		fi		
+			VerboseOutput 5 "Destination unreachable"
+			ExecTime
+			exit 4
+		fi
+
+		if [[ ! -f "$line" ]]; then
+			VerboseOutput 5 "Source-file ${source}/$file Unreachable"
+			ExecTime
+			exit 3
+		fi
+
 		VerboseOutput 1 "Copying: $line"
 		if [[ "$dest/$line" = */* ]]; then
 			mkdir -p "$dest/${line%/*}";
@@ -192,6 +215,12 @@ CleanUp() {
 	VerboseOutput 1 "Done"
 }
 
+ExecTime() {
+	termin=$(date +"%s")
+	difftimelps=$(($termin-$begin))
+	VerboseOutput 1 "$(($difftimelps / 60)) minutes and $(($difftimelps % 60)) seconds elapsed for Script Execution."
+}
+
 GetOptions $@
 if [[ $help == true ]]; then
 	Usage
@@ -208,7 +237,4 @@ fi
 ConvertFiles
 CopyFiles
 CleanUp
-
-termin=$(date +"%s")
-difftimelps=$(($termin-$begin))
-VerboseOutput 1 "$(($difftimelps / 60)) minutes and $(($difftimelps % 60)) seconds elapsed for Script Execution."
\ No newline at end of file
+ExecTime
\ No newline at end of file