diff --git a/src/ca/caChannel.cpp b/src/ca/caChannel.cpp
index ef3d92d..1146fb6 100644
--- a/src/ca/caChannel.cpp
+++ b/src/ca/caChannel.cpp
@@ -368,8 +368,7 @@ CAChannel::CAChannel(std::string const & _channelName,
     channelRequester(_channelRequester),
     channelID(0),
     channelType(0),
-    elementCount(0),
-    destroyed(false)
+    elementCount(0)
 {
     REFTRACE_INCREMENT(num_instances);
     PVACCESS_REFCOUNT_MONITOR_CONSTRUCT(caChannel);
@@ -439,12 +438,6 @@ CAChannel::~CAChannel()
         cout << "CAChannel::~CAChannel() " << channelName << endl;
     }
     PVACCESS_REFCOUNT_MONITOR_DESTRUCT(caChannel);
-    {
-        Lock lock(requestsMutex);
-        if (destroyed)
-            return;
-        destroyed = true;
-    }
     /* Clear CA Channel */
     threadAttach();
     ca_clear_channel(channelID);
@@ -599,14 +592,6 @@ void CAChannel::printInfo(std::ostream& out)
 }
 
 
-/* --------------- Destroyable --------------- */
-
-
-void CAChannel::destroy()
-{
-std::cerr << "Why is CAChannel::destroy() being called\n";
-}
-
 /* ---------------------------------------------------------- */
 
 void CAChannel::threadAttach()
@@ -666,8 +651,7 @@ CAChannelGet::CAChannelGet(CAChannel::shared_pointer const & channel,
   :
     channel(channel),
     channelGetRequester(channelGetRequester),
-    pvRequest(pvRequest),  
-    lastRequestFlag(false)
+    pvRequest(pvRequest)
 {
     REFTRACE_INCREMENT(num_instances);
     if(DEBUG_LEVEL>0) {
@@ -1145,8 +1129,6 @@ void CAChannelGet::get()
         EXCEPTION_GUARD(getRequester->getDone(errorStatus, shared_from_this(), PVStructure::shared_pointer(), BitSet::shared_pointer()));
     }
 
-    if (lastRequestFlag)
-        destroy();
 }
 
 
@@ -1164,17 +1146,12 @@ void CAChannelGet::cancel()
 
 void CAChannelGet::lastRequest()
 {
-    // TODO sync !!!
-    lastRequestFlag = true;
+    std::cout << "CAChannelGet::lastRequest() "
+              << channel->getChannelName() 
+              << " does not do anything"
+              << endl;
 }
 
-/* --------------- Destroyable --------------- */
-
-
-void CAChannelGet::destroy()
-{
-    // TODO
-}
 
 
 CAChannelPutPtr CAChannelPut::create(
@@ -1203,8 +1180,7 @@ CAChannelPut::CAChannelPut(CAChannel::shared_pointer const & channel,
     channel(channel),
     channelPutRequester(channelPutRequester),
     pvRequest(pvRequest), 
-    block(false),   
-    lastRequestFlag(false)
+    block(false)
 {
     REFTRACE_INCREMENT(num_instances);
     if(DEBUG_LEVEL>0) {
@@ -1521,9 +1497,6 @@ void CAChannelPut::put(PVStructure::shared_pointer const & pvPutStructure,
         std::cout << "no put func implemented" << std::endl;
     }
 
-    // TODO here???!!!
-    if (lastRequestFlag)
-        destroy();
 }
 
 
@@ -1551,9 +1524,6 @@ void CAChannelPut::getDone(struct event_handler_args &args)
                         PVStructure::shared_pointer(), BitSet::shared_pointer()));
     }
 
-    // TODO here???!!!
-    if (lastRequestFlag)
-        destroy();
 }
 
 
@@ -1593,17 +1563,12 @@ void CAChannelPut::cancel()
 
 void CAChannelPut::lastRequest()
 {
-    // TODO sync !!!
-    lastRequestFlag = true;
+   std::cout << "CAChannelPut::lastRequest() "
+              << channel->getChannelName() 
+              << " does not do anything"
+              << endl;
 }
 
-/* --------------- Destroyable --------------- */
-
-
-void CAChannelPut::destroy()
-{
-    // TODO
-}
 
 /* --------------- Monitor --------------- */
 
@@ -1900,15 +1865,5 @@ void CAChannelMonitor::cancel()
     // noop
 }
 
-/* --------------- Destroyable --------------- */
-
-
-void CAChannelMonitor::destroy()
-{
-    if(!isStarted) return;
-    channel->threadAttach();
-    ca_clear_subscription(eventID);
-    isStarted = false;
-}
 
 }}}
diff --git a/src/ca/caChannel.h b/src/ca/caChannel.h
index 4a00d6b..8fd3120 100644
--- a/src/ca/caChannel.h
+++ b/src/ca/caChannel.h
@@ -90,7 +90,7 @@ public:
 
     /* --------------- Destroyable --------------- */
 
-    virtual void destroy();
+    virtual void destroy() EPICS_DEPRECATED {};
 
     /* ---------------------------------------------------------------- */
 
@@ -120,7 +120,6 @@ private:
 
     epics::pvData::Mutex requestsMutex;
 
-    bool destroyed;
     std::queue<CAChannelPutPtr> putQueue;
     std::queue<CAChannelGetPtr> getQueue;
     std::queue<CAChannelMonitorPtr> monitorQueue;
@@ -169,7 +168,7 @@ public:
     /* --------------- ChannelBaseRequester --------------- */
     virtual void channelDisconnect(bool destroy);
    /* --------------- Destroyable --------------- */
-    virtual void destroy();
+    virtual void destroy() EPICS_DEPRECATED {};
 
     void activate();
 
@@ -182,7 +181,6 @@ private:
     CAChannelPtr channel;
     ChannelGetRequester::weak_pointer channelGetRequester;
     epics::pvData::PVStructure::shared_pointer pvRequest;
-    bool lastRequestFlag;
 
     chtype getType;
     epics::pvData::PVStructure::shared_pointer pvStructure;
@@ -238,7 +236,7 @@ public:
     virtual void channelDisconnect(bool destroy);
     /* --------------- Destroyable --------------- */
 
-    virtual void destroy();
+    virtual void destroy() EPICS_DEPRECATED {};
 
      void activate();
 
@@ -252,7 +250,6 @@ private:
     ChannelPutRequester::weak_pointer channelPutRequester;
     epics::pvData::PVStructure::shared_pointer pvRequest;
     bool block;
-    bool lastRequestFlag;
 
     chtype getType;
     epics::pvData::PVStructure::shared_pointer pvStructure;
@@ -302,7 +299,7 @@ public:
     /* --------------- ChannelBaseRequester --------------- */
     virtual void channelDisconnect(bool destroy);
     /* --------------- Destroyable --------------- */
-    virtual void destroy();
+    virtual void destroy() EPICS_DEPRECATED {};
     void activate();
 private:
 
diff --git a/src/ca/caProvider.cpp b/src/ca/caProvider.cpp
index 20789b3..b701373 100644
--- a/src/ca/caProvider.cpp
+++ b/src/ca/caProvider.cpp
@@ -127,10 +127,6 @@ void CAChannelProvider::poll()
 {
 }
 
-void CAChannelProvider::destroy()
-{
-    std::cerr << "CAChannelProvider::destroy() should not be called\n";
-}
 
 void CAChannelProvider::threadAttach()
 {
@@ -139,6 +135,7 @@ void CAChannelProvider::threadAttach()
 
 void CAChannelProvider::initialize()
 {
+    if(DEBUG_LEVEL>0) std::cout << "CAChannelProvider::initialize()\n";
     /* Create Channel Access */
     int result = ca_context_create(ca_enable_preemptive_callback);
     if (result != ECA_NORMAL) {
@@ -166,6 +163,11 @@ void ca_factory_cleanup(void*)
 
 void CAClientFactory::start()
 {
+    if(DEBUG_LEVEL>0) std::cout << "CAClientFactory::start()\n";
+    if(ChannelProviderRegistry::clients()->getProvider("ca")) {
+         // do not start twice
+         return;
+    }
     epicsSignalInstallSigAlarmIgnore();
     epicsSignalInstallSigPipeIgnore();
     registerRefCounter("CAChannelProvider", &CAChannelProvider::num_instances);
@@ -175,7 +177,9 @@ void CAClientFactory::start()
     registerRefCounter("CAChannelMonitor", &CAChannelMonitor::num_instances);
 
     if(ChannelProviderRegistry::clients()->add<CAChannelProvider>("ca", false))
+    {
         epicsAtExit(&ca_factory_cleanup, NULL);
+    }
 }
 
 void CAClientFactory::stop()
diff --git a/src/ca/caProviderPvt.h b/src/ca/caProviderPvt.h
index a0468a5..3e4b3a5 100644
--- a/src/ca/caProviderPvt.h
+++ b/src/ca/caProviderPvt.h
@@ -11,12 +11,10 @@
 
 #include <pv/caProvider.h>
 #include <pv/pvAccess.h>
-#include <map>
 
 
 namespace epics {
 namespace pvAccess {
-class Configuration;
 namespace ca {
 
 #define DEBUG_LEVEL 0
@@ -64,20 +62,15 @@ public:
     virtual void flush();
     virtual void poll();
 
-    virtual void destroy();
-
+    virtual void destroy() EPICS_DEPRECATED {};
 
     /* ---------------------------------------------------------------- */
 
     void threadAttach();
 
 private:
-
     void initialize();
-
     ca_client_context* current_context;
-
-    epics::pvData::Mutex channelsMutex;
 };
 
 }
diff --git a/src/ca/pv/caProvider.h b/src/ca/pv/caProvider.h
index f6291a6..3f75c4a 100644
--- a/src/ca/pv/caProvider.h
+++ b/src/ca/pv/caProvider.h
@@ -12,7 +12,6 @@
 
 namespace epics {
 namespace pvAccess {
-class Configuration;
 namespace ca {
 
 /**