diff --git a/q b/q
index 80c59eb..6fa707d 100755
--- a/q
+++ b/q
@@ -14,12 +14,19 @@ function downloadSysList(){
 }
 
 function filterList(){
+  nl=$(cat /home/fanta/vms/.systems.lst | wc -l)
   cat -n  $vmsDir/.systems.lst | cut -d ";" -f 1,2 | tr ";" " "
   echo " "
   read -p "Number: " option
   if [[ $option == ?(-)+([0-9]) ]] ; then
-    cat $vmsDir/.systems.lst | head -$option | tail -1 > $vmsDir/.systems2.lst
-    mv $vmsDir/.systems2.lst $vmsDir/.systems.lst
+    if [ "$option" -ge 1 ] && [ "$option" -le $nl ]; then
+      cat $vmsDir/.systems.lst | head -$option | tail -1 > $vmsDir/.systems2.lst
+      mv $vmsDir/.systems2.lst $vmsDir/.systems.lst
+    else
+      echo -e "\nError: Try again and enter a valid number my friend"
+      exit
+    fi
+
   else
     echo -e "\nError: Try again and enter a integer number my friend"
     exit