--- /RefinedSoundex.java	2023-07-05 03:07:10.242036335 +0200
+++ /Codec-1/src/java/org/apache/commons/codec/language/RefinedSoundex.java	2023-07-05 03:07:10.246036334 +0200
@@ -168,7 +168,7 @@
 
         for (int i = 0; i < str.length(); i++) {
 
-            current = getMappingCode(str.charAt(i));
+current =  getMappingCode ( null.charAt ( i )  ) ;
             if (current == last) {
                 continue;
             } else if (current != 0) {
