diff --git a/src/ca/cac.cpp b/src/ca/cac.cpp
index b3c4ccb61..e2eacd237 100644
--- a/src/ca/cac.cpp
+++ b/src/ca/cac.cpp
@@ -1249,17 +1249,17 @@ cacChannel::ioid cac::subscriptionRequest ( nciu &chan, unsigned type,
     }
 }
 
-bool cac::noopAction ( tcpiiu &iiu, const caHdr &, void *pMsgBdy )
+bool cac::noopAction ( tcpiiu &, const caHdr &, void * /* pMsgBdy */ )
 {
     return true;
 }
  
-bool cac::echoRespAction ( tcpiiu &iiu, const caHdr &, void *pMsgBdy )
+bool cac::echoRespAction ( tcpiiu &, const caHdr &, void * /* pMsgBdy */ )
 {
     return true;
 }
 
-bool cac::writeNotifyRespAction ( tcpiiu &iiu, const caHdr &hdr, void *pMsgBdy )
+bool cac::writeNotifyRespAction ( tcpiiu &, const caHdr &hdr, void * /* pMsgBdy */ )
 {
     int caStatus = hdr.m_cid;
     if ( caStatus == ECA_NORMAL ) {
@@ -1358,13 +1358,13 @@ bool cac::eventRespAction ( tcpiiu &iiu, const caHdr &hdr, void *pMsgBdy )
     }
 }
 
-bool cac::readRespAction ( tcpiiu &iiu, const caHdr &hdr, void *pMsgBdy )
+bool cac::readRespAction ( tcpiiu &, const caHdr &hdr, void *pMsgBdy )
 {
     return this->ioCompletionNotifyAndDestroy ( hdr.m_available,
         hdr.m_dataType, hdr.m_count, pMsgBdy );
 }
 
-bool cac::clearChannelRespAction ( tcpiiu &iiu, const caHdr &, void *pMsgBdy )
+bool cac::clearChannelRespAction ( tcpiiu &, const caHdr &, void * /* pMsgBdy */ )
 {
     return true; // currently a noop
 }
@@ -1412,7 +1412,7 @@ bool cac::exceptionRespAction ( tcpiiu &iiu, const caHdr &hdr, void *pMsgBdy )
     }
 }
 
-bool cac::accessRightsRespAction ( tcpiiu &iiu, const caHdr &hdr, void *pMsgBdy )
+bool cac::accessRightsRespAction ( tcpiiu &, const caHdr &hdr, void * /* pMsgBdy */ )
 {
     nciu * pChan = this->chanTable.lookup ( hdr.m_cid );
     if ( pChan ) {
@@ -1425,7 +1425,7 @@ bool cac::accessRightsRespAction ( tcpiiu &iiu, const caHdr &hdr, void *pMsgBdy
     return true;
 }
 
-bool cac::claimCIURespAction ( tcpiiu &iiu, const caHdr &hdr, void *pMsgBdy )
+bool cac::claimCIURespAction ( tcpiiu &iiu, const caHdr &hdr, void * /* pMsgBdy */ )
 {
     nciu * pChan = this->chanTable.lookup ( hdr.m_cid );
     if ( pChan ) {
@@ -1444,7 +1444,7 @@ bool cac::claimCIURespAction ( tcpiiu &iiu, const caHdr &hdr, void *pMsgBdy )
     }
 }
 
-bool cac::verifyAndDisconnectChan ( tcpiiu &iiu, const caHdr &hdr, void *pMsgBdy )
+bool cac::verifyAndDisconnectChan ( tcpiiu &, const caHdr &hdr, void * /* pMsgBdy */ )
 {
     nciu * pChan = this->chanTable.lookup ( hdr.m_cid );
     if ( pChan ) {
@@ -1455,7 +1455,7 @@ bool cac::verifyAndDisconnectChan ( tcpiiu &iiu, const caHdr &hdr, void *pMsgBdy
     return true;
 }
 
-bool cac::badTCPRespAction ( tcpiiu &iiu, const caHdr &hdr, void *pMsgBdy )
+bool cac::badTCPRespAction ( tcpiiu &iiu, const caHdr &hdr, void * /* pMsgBdy */ )
 {
     char hostName[64];
     iiu.hostName ( hostName, sizeof(hostName) );
diff --git a/src/ca/iocinf.h b/src/ca/iocinf.h
index b4e588c61..c71b3a7f7 100644
--- a/src/ca/iocinf.h
+++ b/src/ca/iocinf.h
@@ -331,7 +331,7 @@ public:
         nciu &chan, unsigned type, unsigned long count, 
         unsigned mask, cacDataNotify &notify );
     void show ( unsigned level ) const;
-    unsigned long getCount ( nciu & ) const;
+    unsigned long getCount () const;
     unsigned getType () const;
     unsigned getMask () const;
     void destroy ( class cacRecycle & );
diff --git a/src/ca/nciu.cpp b/src/ca/nciu.cpp
index 8a9cc92fe..ecffc8177 100644
--- a/src/ca/nciu.cpp
+++ b/src/ca/nciu.cpp
@@ -323,14 +323,14 @@ void nciu::subscribe ( unsigned type, unsigned long nElem,
     }
 }
 
-void nciu::ioCancel ( const ioid &id )
+void nciu::ioCancel ( const ioid &idIn )
 {
-    this->cacCtx.ioCancel ( *this, id );
+    this->cacCtx.ioCancel ( *this, idIn );
 }
 
-void nciu::ioShow ( const ioid &id, unsigned level ) const
+void nciu::ioShow ( const ioid &idIn, unsigned level ) const
 {
-    this->cacCtx.ioShow ( id, level );
+    this->cacCtx.ioShow ( idIn, level );
 }
 
 void nciu::initiateConnect ()
diff --git a/src/ca/netSubscription.cpp b/src/ca/netSubscription.cpp
index d14ec8cb7..652767196 100644
--- a/src/ca/netSubscription.cpp
+++ b/src/ca/netSubscription.cpp
@@ -59,10 +59,10 @@ void netSubscription::exception ( int status, const char *pContext )
     this->notify.exception ( status, pContext, UINT_MAX, 0 );
 }
 
-void netSubscription::completion ( unsigned type, 
-    unsigned long count, const void *pData )
+void netSubscription::completion ( unsigned typeIn, 
+    unsigned long countIn, const void *pDataIn )
 {
-    this->notify.completion ( type, count, pData );
+    this->notify.completion ( typeIn, countIn, pDataIn );
 }
 
 void netSubscription::exception ( int status, 
diff --git a/src/ca/netSubscription_IL.h b/src/ca/netSubscription_IL.h
index db73f1cb3..4235249c8 100644
--- a/src/ca/netSubscription_IL.h
+++ b/src/ca/netSubscription_IL.h
@@ -46,9 +46,9 @@ inline void netSubscription::operator delete ( void *pCadaver, size_t size,
 }
 #endif
 
-inline unsigned long netSubscription::getCount ( nciu &chan ) const
+inline unsigned long netSubscription::getCount () const
 {
-    unsigned long nativeCount = chan.nativeElementCount ();
+    unsigned long nativeCount = this->chan.nativeElementCount ();
     if ( this->count == 0u || this->count > nativeCount ) {
         return nativeCount;
     }
diff --git a/src/ca/netWriteNotifyIO.cpp b/src/ca/netWriteNotifyIO.cpp
index d55995d4b..cb5d82613 100644
--- a/src/ca/netWriteNotifyIO.cpp
+++ b/src/ca/netWriteNotifyIO.cpp
@@ -49,14 +49,14 @@ void netWriteNotifyIO::exception ( int status, const char *pContext )
     this->notify.exception ( status, pContext );
 }
 
-void netWriteNotifyIO::completion ( unsigned type, 
-    unsigned long count, const void *pData )
+void netWriteNotifyIO::completion ( unsigned /* type */, 
+    unsigned long /* count */, const void * /* pData */ )
 {
     this->chan.getClient().printf ( "Write response with data ?\n" );
 }
 
 void netWriteNotifyIO::exception ( int status, 
-    const char *pContext, unsigned type, unsigned long count )
+    const char *pContext, unsigned /* type */, unsigned long /* count */ )
 {
     this->notify.exception ( status, pContext );
 }
diff --git a/src/ca/tcpiiu.cpp b/src/ca/tcpiiu.cpp
index 4a164b763..81acb218e 100644
--- a/src/ca/tcpiiu.cpp
+++ b/src/ca/tcpiiu.cpp
@@ -1261,7 +1261,7 @@ void tcpiiu::subscriptionRequest ( nciu &chan, netSubscription & subscr )
         return;
     }
 
-    unsigned long count = subscr.getCount ( chan );
+    unsigned long count = subscr.getCount ();
     if ( count == 0u || count > 0xffff ) {
         this->pCAC()->printf ( "CAC: subscriptionRequest() ignored because of unexpected bad count that was checked earlier\n" );
         return;
@@ -1291,7 +1291,7 @@ void tcpiiu::subscriptionCancelRequest ( nciu &chan, netSubscription &subscr )
     this->sendQue.pushUInt16 ( CA_PROTO_EVENT_CANCEL ); // cmd
     this->sendQue.pushUInt16 ( 0u ); // postsize
     this->sendQue.pushUInt16 ( static_cast < ca_uint16_t > ( subscr.getType () ) ); // dataType
-    this->sendQue.pushUInt16 ( static_cast < ca_uint16_t > ( subscr.getCount ( chan ) ) ); // count
+    this->sendQue.pushUInt16 ( static_cast < ca_uint16_t > ( subscr.getCount () ) ); // count
     this->sendQue.pushUInt32 ( chan.getSID () ); // cid
     this->sendQue.pushUInt32 ( subscr.getID() ); // available
 }
diff --git a/src/db/dbCAC.h b/src/db/dbCAC.h
index c813c7a4c..c4bc60b70 100644
--- a/src/db/dbCAC.h
+++ b/src/db/dbCAC.h
@@ -143,7 +143,7 @@ public:
     virtual ~dbServiceIO ();
     cacChannel *createChannel ( const char *pName, cacChannelNotify & );
     void callReadNotify ( struct dbAddr &addr, unsigned type, unsigned long count, 
-            const struct db_field_log *pfl, cacChannel &, cacDataNotify &notify );
+            const struct db_field_log *pfl, cacDataNotify &notify );
     dbEventSubscription subscribe ( struct dbAddr &addr, dbChannelIO &chan,
         dbSubscriptionIO &subscr, unsigned mask, cacChannel::ioid * );
     void initiatePutNotify ( dbChannelIO &, struct dbAddr &, unsigned type, 
diff --git a/src/db/dbChannelIO.cpp b/src/db/dbChannelIO.cpp
index 7d557f6c3..4e047f3e4 100644
--- a/src/db/dbChannelIO.cpp
+++ b/src/db/dbChannelIO.cpp
@@ -55,7 +55,7 @@ cacChannel::ioStatus dbChannelIO::read ( unsigned type,
      unsigned long count, cacDataNotify &notify, ioid * ) 
 {
     this->serviceIO.callReadNotify ( this->addr, 
-        type, count, 0, *this, notify );
+        type, count, 0, notify );
     return iosSynch;
 }
 
diff --git a/src/db/dbChannelIOIL.h b/src/db/dbChannelIOIL.h
index 49cfc33f8..6ce4cdec5 100644
--- a/src/db/dbChannelIOIL.h
+++ b/src/db/dbChannelIOIL.h
@@ -57,5 +57,5 @@ inline short dbChannelIO::nativeType () const
 inline void dbChannelIO::callReadNotify ( unsigned type, unsigned long count, 
         const struct db_field_log *pfl, cacDataNotify &notify )
 {
-    this->serviceIO.callReadNotify ( this->addr, type, count, pfl, *this, notify );
+    this->serviceIO.callReadNotify ( this->addr, type, count, pfl, notify );
 }
diff --git a/src/db/dbServiceIO.cpp b/src/db/dbServiceIO.cpp
index 444fba821..a8074563a 100644
--- a/src/db/dbServiceIO.cpp
+++ b/src/db/dbServiceIO.cpp
@@ -84,7 +84,7 @@ cacChannel *dbServiceIO::createChannel (
 void dbServiceIO::callReadNotify ( struct dbAddr &addr, 
         unsigned type, unsigned long count, 
         const struct db_field_log *pfl, 
-        cacChannel &chan, cacDataNotify &notify )
+        cacDataNotify &notify )
 {
     unsigned long size = dbr_size_n ( type, count );