diff --git a/pvDataApp/factory/PVField.cpp b/pvDataApp/factory/PVField.cpp
index 614ceec..3b35602 100644
--- a/pvDataApp/factory/PVField.cpp
+++ b/pvDataApp/factory/PVField.cpp
@@ -47,7 +47,7 @@ void PVField::message(String fieldName,String message,MessageType messageType)
         requester->message(mess,messageType);
     } else {
         printf("%s %s %s\n",
-            messageTypeName[messageType].c_str(),
+            getMessageTypeName(messageType).c_str(),
             fieldName.c_str(),
             message.c_str());
     }
@@ -148,7 +148,6 @@ void PVField::renameField(String  newName)
     }
     std::tr1::shared_ptr<Structure> parentStructure = const_pointer_cast<Structure>(
          parent->getStructure());
-    StringArray const &fieldNames = parentStructure->getFieldNames();
     FieldConstPtrArray const &fields = parentStructure->getFields();
     for(size_t i=0; i<fields.size(); i++) {
          if(fields[i].get()==field.get()) {
diff --git a/pvDataApp/misc/requester.cpp b/pvDataApp/misc/requester.cpp
index 2cfa2c3..dc9b5dd 100644
--- a/pvDataApp/misc/requester.cpp
+++ b/pvDataApp/misc/requester.cpp
@@ -5,18 +5,27 @@
  * in file LICENSE that is included with this distribution.
  */
 #include <string>
+#include <cstdio>
+#include <pv/lock.h>
 #include <pv/requester.h>
 namespace epics { namespace pvData { 
 
 const size_t messageTypeCount = 4; 
+static StringArray messageTypeName(messageTypeCount);
 
-StringArray messageTypeName(messageTypeCount);
-void Requester::init()
+String getMessageTypeName(MessageType messageType)
 {
-    messageTypeName[0] = "info";
-    messageTypeName[1] = "warning";
-    messageTypeName[2] = "error";
-    messageTypeName[3] = "fatalError";
+    static Mutex mutex;
+    Lock xx(mutex);
+    if(messageTypeName[0].size()==0) {
+        messageTypeName[0] = "info";
+        messageTypeName[1] = "warning";
+        messageTypeName[2] = "error";
+        messageTypeName[3] = "fatalError";
+    }
+    return messageTypeName[messageType];
 }
 
+
+
 }}
diff --git a/pvDataApp/misc/requester.h b/pvDataApp/misc/requester.h
index a7259f6..75ff385 100644
--- a/pvDataApp/misc/requester.h
+++ b/pvDataApp/misc/requester.h
@@ -18,17 +18,14 @@ enum MessageType {
    infoMessage,warningMessage,errorMessage,fatalErrorMessage
 };
 
-extern StringArray messageTypeName;
+extern String getMessageTypeName(MessageType messageType);
 extern const size_t messageTypeCount;
 class Requester {
 public:
     POINTER_DEFINITIONS(Requester);
-
     virtual ~Requester(){}
     virtual String getRequesterName() = 0;
     virtual void message(String message,MessageType messageType) = 0;
-private:
-    static void init();
 };
 
 }}
diff --git a/testApp/misc/testMessageQueue.cpp b/testApp/misc/testMessageQueue.cpp
index afa9d28..52b1461 100644
--- a/testApp/misc/testMessageQueue.cpp
+++ b/testApp/misc/testMessageQueue.cpp
@@ -58,7 +58,7 @@ static void testBasic(FILE * fd,FILE *auxfd ) {
     assert(messageNode.get()!=0);
     fprintf(fd,"message %s messageType %s\n",
         messageNode->getMessage().c_str(),
-        messageTypeName[messageNode->getMessageType()].c_str());
+        getMessageTypeName(messageNode->getMessageType()).c_str());
     assert(messageNode->getMessage().compare(messages[0])==0);
     queue->release();
     messageNode = queue->get();
@@ -69,7 +69,7 @@ static void testBasic(FILE * fd,FILE *auxfd ) {
     assert(messageNode.get()!=0);
     fprintf(fd,"message %s messageType %s\n",
         messageNode->getMessage().c_str(),
-        messageTypeName[messageNode->getMessageType()].c_str());
+        getMessageTypeName(messageNode->getMessageType()).c_str());
     assert(messageNode->getMessage().compare(messages[3])==0);
     queue->release();
     result = queue->isEmpty();