diff --git a/slsDetectorSoftware/multiSlsDetector/multiSlsDetector.cpp b/slsDetectorSoftware/multiSlsDetector/multiSlsDetector.cpp
index cf15fb593..755ed343f 100644
--- a/slsDetectorSoftware/multiSlsDetector/multiSlsDetector.cpp
+++ b/slsDetectorSoftware/multiSlsDetector/multiSlsDetector.cpp
@@ -1365,7 +1365,6 @@ int* multiSlsDetector::readFrame(){
     }
   }
   dataQueue.push(retval);
-  sem_post(&queue_mutex);
   return retval;
 
 };
@@ -1401,7 +1400,6 @@ int* multiSlsDetector::readAll(){
       //std::cout << "-" << flush;
 #endif
       dataQueue.push(retval);
-  	  sem_post(&queue_mutex);
     }
     for (int id=0; id<thisMultiDetector->numberOfDetectors; id++) {
       if (detectors[id]) {
@@ -1442,7 +1440,6 @@ int* multiSlsDetector::startAndReadAll(){
       //std::cout << "-" << flush;
 #endif
       dataQueue.push(retval);
-  	  sem_post(&queue_mutex);
     }
 
     for (int id=0; id<thisMultiDetector->numberOfDetectors; id++) {
@@ -1533,7 +1530,6 @@ slsDetectorDefs::runStatus  multiSlsDetector::getRunStatus() {
 
 int* multiSlsDetector::popDataQueue() {
   int *retval=NULL;
-  sem_wait(&queue_mutex);
   if( !dataQueue.empty() ) {
     retval=dataQueue.front();
     dataQueue.pop();
@@ -1553,7 +1549,6 @@ detectorData* multiSlsDetector::popFinalDataQueue() {
 void multiSlsDetector::resetDataQueue() {
   int *retval=NULL;
   while( !dataQueue.empty() ) {
-	sem_wait(&queue_mutex);
     retval=dataQueue.front();
     dataQueue.pop();
     delete [] retval;
diff --git a/slsDetectorSoftware/slsDetector/slsDetector.cpp b/slsDetectorSoftware/slsDetector/slsDetector.cpp
index 470f0bfbc..4b70951c8 100644
--- a/slsDetectorSoftware/slsDetector/slsDetector.cpp
+++ b/slsDetectorSoftware/slsDetector/slsDetector.cpp
@@ -3237,7 +3237,6 @@ int* slsDetector::readFrame(){
       retval=getDataFromDetector();
       if (retval) {
 	dataQueue.push(retval);
-	sem_post(&queue_mutex);
 	controlSocket->Disconnect();
       }
     }
@@ -3334,7 +3333,6 @@ int* slsDetector::readAll(){
 	//std::cout << "-" << flush ;
 #endif
 	dataQueue.push(retval);
-	sem_post(&queue_mutex);
       }
       controlSocket->Disconnect();
     }
@@ -3395,7 +3393,6 @@ int* slsDetector::startAndReadAll(){
     //std::cout<< "-" << flush;
 #endif
     dataQueue.push(retval);
-	sem_post(&queue_mutex);
   }
   controlSocket->Disconnect();
 
diff --git a/slsDetectorSoftware/slsDetectorAnalysis/postProcessing.cpp b/slsDetectorSoftware/slsDetectorAnalysis/postProcessing.cpp
index 35fadb178..23acee602 100644
--- a/slsDetectorSoftware/slsDetectorAnalysis/postProcessing.cpp
+++ b/slsDetectorSoftware/slsDetectorAnalysis/postProcessing.cpp
@@ -37,7 +37,7 @@ postProcessing::postProcessing(): expTime(NULL), ang(NULL), val(NULL), err(NULL)
   rawDataReady = 0;
   pRawDataArg = 0;
 
-  sem_init(&queue_mutex,0,0);
+ /* sem_init(&queue_mutex,0,0);*/
 
 #ifdef VERBOSE
   registerDataCallback(&defaultDataReadyFunc,  NULL);
@@ -583,7 +583,6 @@ int* postProcessing::popDataQueue() {
   cout << "Pop data queue lock" << endl;
 #endif
 
-  sem_wait(&queue_mutex);
   pthread_mutex_lock(&mp);
   if( !dataQueue.empty() ) {
     retval=dataQueue.front();
@@ -612,7 +611,6 @@ void postProcessing::resetDataQueue() {
   int *retval=NULL;
   pthread_mutex_lock(&mp);
   while( !dataQueue.empty() ) {
-    sem_wait(&queue_mutex);
     retval=dataQueue.front();
     dataQueue.pop();
     delete [] retval;
diff --git a/slsDetectorSoftware/slsDetectorAnalysis/postProcessing.h b/slsDetectorSoftware/slsDetectorAnalysis/postProcessing.h
index c7c72c19d..bf7b97953 100644
--- a/slsDetectorSoftware/slsDetectorAnalysis/postProcessing.h
+++ b/slsDetectorSoftware/slsDetectorAnalysis/postProcessing.h
@@ -296,7 +296,7 @@ s
   int queuesize;
 
   /** queue mutex */
-  sem_t queue_mutex;
+  /*sem_t queue_mutex;*/
 
 
   /**