src/de/steamwar/command/CommandPart.java

@@ -134,7 +134,7 @@ class CommandPart<T> {
     public void generateTabComplete(List<String> current, T sender, String[] args, int startIndex) {
         if (varArgType != null) {
             for (int i = startIndex; i < args.length - 1; i++) {
-                CheckArgumentResult validArgument = checkArgument(null, sender, args, i);
+                CheckArgumentResult validArgument = checkArgument(GuardCheckType.TAB_COMPLETE, sender, args, i);
                 if (!validArgument.success) {
                     return;
                 }