diff --git a/cluster/maco.check.update.sh b/cluster/maco.check.update.sh
index 7eb79ea..dd8ee1c 100755
--- a/cluster/maco.check.update.sh
+++ b/cluster/maco.check.update.sh
@@ -66,6 +66,33 @@ message() {                                                     # {{{
 
 	return 0
 
+}
+# }}}
+is_var_empty() {                                                # {{{
+
+	## Return False by default
+	return_var_empty="1"
+	## Total number of variables to test
+	local_total_var="${#}"
+
+	loop_count_var_empty="0"
+
+	## While it remains a variable to test
+	while [ "${local_total_var}" -gt "${loop_count_var_empty}" ]; do
+		debug_message "is_var_empty − \
+Test var: ${1}."
+		### Test if this is empty and set return value to True
+		[ -z "${1}" ] && return_var_empty="0"
+
+		### Increase the number of tested variables
+		loop_count_var_empty=$((loop_count_var_empty+1))
+
+		### Shift to the next variable
+		shift
+	done
+
+	return "${return_var_empty}"
+
 }
 # }}}
 is_maco_urgent_upgrade_require() {                              # {{{
@@ -140,17 +167,19 @@ Disable SGE queue."
 main() {                                                        # {{{
 
 	## Get all Maco's versions (date)
-	readonly CURRENT_MACO_VERSION=$(< "${MACO_LOCAL_DIR}/maco-version.txt" awk -v FS=. '{ print $1 "-" $2 "-" $3 "T" $4 ":" $5 ":" $6 }' \
-		|| exit 1)
-	readonly LATEST_MACO_VERSION=$(< "${MACO_INSTALL_DIR}/maco-version.txt" awk -v FS=. '{ print $1 "-" $2 "-" $3 "T" $4 ":" $5 ":" $6 }' \
-		|| exit 2)
-	readonly URGENT_MACO_VERSION=$(< "${MACO_INSTALL_DIR}/urgent-maco-version.txt" awk -v FS=. '{ print $1 "-" $2 "-" $3 "T" $4 ":" $5 ":" $6 }' \
-		|| exit 3)
+	readonly CURRENT_MACO_VERSION=$(< "${MACO_LOCAL_DIR}/maco-version.txt" awk -v FS=. '{ print $1 "-" $2 "-" $3 "T" $4 ":" $5 ":" $6 }' )
+	readonly LATEST_MACO_VERSION=$(< "${MACO_INSTALL_DIR}/maco-version.txt" awk -v FS=. '{ print $1 "-" $2 "-" $3 "T" $4 ":" $5 ":" $6 }' )
+	readonly URGENT_MACO_VERSION=$(< "${MACO_INSTALL_DIR}/urgent-maco-version.txt" awk -v FS=. '{ print $1 "-" $2 "-" $3 "T" $4 ":" $5 ":" $6 }' )
 	## Convert version to timestamp
 	readonly CURRENT_TIMESTAMP=$(date -d "${CURRENT_MACO_VERSION}" "+%s")
 	readonly LATEST_TIMESTAMP=$(date -d "${LATEST_MACO_VERSION}" "+%s")
 	readonly URGENT_TIMESTAMP=$(date -d "${URGENT_MACO_VERSION}" "+%s")
 
+	## If a variable is empty
+	##  Exit with error code
+	is_var_empty "${CURRENT_MACO_VERSION}" "${LATEST_MACO_VERSION}" "${URGENT_MACO_VERSION}" "${CURRENT_TIMESTAMP}" "${LATEST_TIMESTAMP}" "${URGENT_TIMESTAMP}" \
+		&& exit 1
+
 	is_maco_uptodate \
 		&& exit 0