diff --git a/start.sh b/start.sh
index 887047b..0c876b8 100755
--- a/start.sh
+++ b/start.sh
@@ -56,6 +56,14 @@ check() {
         echo "hint: mount -t drvfs //truenas.home.weaver/dayz $DAYZ_FILES"
         exit 1
     fi
+
+    if [ ! -d "$MAIN" ] ; then
+        die "$MAIN does not exist"
+    fi
+    
+    if [ ! -d "$STOCK_SERVER_DATA" ] ; then
+        die "$STOCK_SERVER_DATA does not exist"
+    fi
 }
 
 # -*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*