diff --git a/JHazm/src/JHazm/HamshahriReader.java b/JHazm/src/JHazm/HamshahriReader.java
index 1bca8eb..1376988 100644
--- a/JHazm/src/JHazm/HamshahriReader.java
+++ b/JHazm/src/JHazm/HamshahriReader.java
@@ -100,6 +100,10 @@ protected void yieldNextCore() {
             if (!isOpen) {
                 do {
                     index++;
+                    if (index >= allFiles.size()) {
+                        yieldBreak();
+                        return;
+                    }
                     file = new File(allFiles.get(index));
                 } while (getInvalidFiles().contains(file.getName()));
             }
@@ -178,4 +182,4 @@ protected void yieldNextCore() {
             }
         }
     }
-}
\ No newline at end of file
+}