diff --git a/spwplugin/GR-ESB/gr_esb_bridge.cpp b/spwplugin/GR-ESB/gr_esb_bridge.cpp
--- a/spwplugin/GR-ESB/gr_esb_bridge.cpp
+++ b/spwplugin/GR-ESB/gr_esb_bridge.cpp
@@ -139,7 +139,7 @@ unsigned int GR_ESB_bridge::Write(unsign
                     RMAP_MAX_XFER_SIZE*4,
                     writeBuffer);
         manager->sendPacket(writeBuffer,RMAP_WRITE_PACKET_MIN_SZ(RMAP_MAX_XFER_SIZE*4));
-        int len = manager->getRMAPanswer(transactionID,&RMAPAckBuff);
+        manager->getRMAPanswer(transactionID,&RMAPAckBuff);
         free(RMAPAckBuff);
         written+=RMAP_MAX_XFER_SIZE;
         count-=RMAP_MAX_XFER_SIZE;
@@ -166,7 +166,7 @@ unsigned int GR_ESB_bridge::Write(unsign
                     count*4,
                     writeBuffer);
         manager->sendPacket(writeBuffer,RMAP_WRITE_PACKET_MIN_SZ(count*4));
-        int len = manager->getRMAPanswer(transactionID,&RMAPAckBuff);
+        manager->getRMAPanswer(transactionID,&RMAPAckBuff);
         free(RMAPAckBuff);
         written+=count;
         if(progress!=NULL)
@@ -224,8 +224,11 @@ unsigned int GR_ESB_bridge::Read(unsigne
         free(RMAP_AnswerBuffer);
         read+=RMAP_MAX_XFER_SIZE;
         count-=RMAP_MAX_XFER_SIZE;
-        progress->setValue(read);
-        qApp->processEvents();
+        if(progress!=NULL)
+        {
+            progress->setValue(read);
+            qApp->processEvents();
+        }
     }
     if((int)count>0)
     {
@@ -481,11 +484,12 @@ bool GR_ESB_Manager::sendPacket(char *pa
         SPWpacket[1]=(size>>16) & 0x0FF;
         SPWpacket[2]=(size>>8) & 0x0FF;
         SPWpacket[3]=size & 0x0FF;
+        this->handleMutex->lock();
+        result = ((size+4) == this->Write_soc.write(SPWpacket,size+4));
+        this->Write_soc.flush();
+        this->handleMutex->unlock();
+        free(SPWpacket);
     }
-    this->handleMutex->lock();
-    result = ((size+4) == this->Write_soc.write(SPWpacket,size+4));
-    this->Write_soc.flush();
-    this->handleMutex->unlock();
     if (Q_UNLIKELY(!result))
     {
         SocExplorerEngine::message(this->plugin,"ERR sending the READ command ",2);
diff --git a/spwplugin/StarDundee/stardundeespw_usb.cpp b/spwplugin/StarDundee/stardundeespw_usb.cpp
--- a/spwplugin/StarDundee/stardundeespw_usb.cpp
+++ b/spwplugin/StarDundee/stardundeespw_usb.cpp
@@ -215,8 +215,11 @@ unsigned int stardundeeSPW_USB::Read(uns
         free(RMAP_AnswerBuffer);
         read+=RMAP_MAX_XFER_SIZE;
         count-=RMAP_MAX_XFER_SIZE;
-        progress->setValue(read);
-        qApp->processEvents();
+        if(progress!=NULL)
+        {
+            progress->setValue(read);
+            qApp->processEvents();
+        }
     }
     if((int)count>0)
     {
@@ -855,7 +858,7 @@ void stardundeeSPW_USB_Manager::initiali
 unsigned int stardundeeSPW_USB_Manager::getLinkStatus(unsigned char link)
 {
     U32 statusControl, errorStatus, portType;
-    U32 linkStatus, operatingSpeed, outputPortConnection;
+    U32 linkStatus=0, operatingSpeed, outputPortConnection;
     char isLinkRunning, isAutoStart, isStart, isDisabled, isTristate;
 
     // Read the link status control register