Index: lutinutil/src/java/org/codelutin/option/OptionParserContexts.java
diff -u lutinutil/src/java/org/codelutin/option/OptionParserContexts.java:1.3 lutinutil/src/java/org/codelutin/option/OptionParserContexts.java:1.4
--- lutinutil/src/java/org/codelutin/option/OptionParserContexts.java:1.3	Tue Jan  1 20:50:35 2008
+++ lutinutil/src/java/org/codelutin/option/OptionParserContexts.java	Thu Jan  3 06:07:56 2008
@@ -368,7 +368,7 @@
                 lastArgument = null;
                 lastGroup = null;
                 // the group is no more available
-                availabledGroups.remove(context.groupDefinition);
+                availabledGroups.remove(def);
                 return;
             }
             // remove group from available if
@@ -447,6 +447,8 @@
                 result = detectArgument(group, argument, pos);
                 if (result != null) {
                     break;
+                } else {
+                    optionalGroups.remove(0);
                 }
             }
             return result;
@@ -551,6 +553,14 @@
                 // we didn't find a _newFile, it could be also a string
                 result = findArgumentByTypeAndValueType(type, ArgumentValueType.STRING, defs);
             }
+            if (result == null && valueType == ArgumentValueType.CLASS) {
+                // we didn't find a _newFile, it could be also a string
+                result = findArgumentByTypeAndValueType(type, ArgumentValueType.STRING, defs);
+            }
+            if (result == null && valueType == ArgumentValueType.BOOLEAN) {
+                // we didn't find a _newFile, it could be also a string
+                result = findArgumentByTypeAndValueType(type, ArgumentValueType.STRING, defs);
+            }
             log.info(argument + " : " + result);
             return result;
         }
@@ -587,9 +597,9 @@
             this.definition = definition;
             this.commandLinePosition = commandLinePosition;
             this.value = value;
-            this.pos = pos;
+            this.pos = groupDefinition.isMandatory()?pos:-1;
             this.groupDefinition = groupDefinition;
-            log.info(this);
+            log.debug(this);
         }
 
         public Argument instanciate() {