diff --git a/refresh-NebulaCA b/refresh-NebulaCA
index 5f3ce79..a838bc8 100644
--- a/refresh-NebulaCA
+++ b/refresh-NebulaCA
@@ -123,5 +123,11 @@ if [[ $CERTISCASTATUS == true ]]; then
     echo "DateTime: ${DATETIME}"
     echo "NEWFILENAME: ${NEWFILENAME}"
     echo "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"
+    try
+    (
     ${ROOTPATH}/nebula-cert sign -name ${CANAME} -out-crt ${ROOTPATH}/${NEWFILENAME}.crt -out-key ${ROOTPATH}/${NEWFILENAME}.key
+    )
+    catch || {
+        help_msg
+    }
 fi
\ No newline at end of file