diff --git a/slsDetectorSoftware/commonFiles/error_defs.h b/slsDetectorSoftware/commonFiles/error_defs.h
index 5b05ff71b..d75a335f1 100644
--- a/slsDetectorSoftware/commonFiles/error_defs.h
+++ b/slsDetectorSoftware/commonFiles/error_defs.h
@@ -29,6 +29,7 @@ using namespace std;
 #define FILE_PATH_DOES_NOT_EXIST			0x0400000000000000ULL
 #define COULDNOT_CREATE_UDP_SOCKET			0x0200000000000000ULL
 #define COULDNOT_CREATE_FILE				0x0100000000000000ULL
+#define COULDNOT_ENABLE_COMPRESSION			0x0080000000000000ULL
 
 
 
@@ -84,6 +85,9 @@ public:
 		if(slsErrorMask&COULDNOT_CREATE_FILE)
 			retval.append("Could not create file to start receiver.\nCheck permissions of output directory\n");
 
+		if(slsErrorMask&COULDNOT_ENABLE_COMPRESSION)
+			retval.append("Could not enable/disable data compression in receiver.\nThread creation failed.\n");
+
 
 
 
diff --git a/slsDetectorSoftware/commonFiles/sls_detector_funcs.h b/slsDetectorSoftware/commonFiles/sls_detector_funcs.h
index 0b494bb96..9eabed1cb 100644
--- a/slsDetectorSoftware/commonFiles/sls_detector_funcs.h
+++ b/slsDetectorSoftware/commonFiles/sls_detector_funcs.h
@@ -134,7 +134,9 @@ enum {
 
   F_CALIBRATE_PEDESTAL,		/**< starts acquistion, calibrates pedestal and write back to fpga */
 
-  F_READ_RECEIVER_FREQUENCY /**< sets the frequency of receiver sending frames to gui */
+  F_READ_RECEIVER_FREQUENCY, /**< sets the frequency of receiver sending frames to gui */
+
+  F_ENABLE_COMPRESSION		/**< enable compression in receiver */
   /* Always append functions hereafter!!! */
 
 };
diff --git a/slsDetectorSoftware/multiSlsDetector/multiSlsDetector.cpp b/slsDetectorSoftware/multiSlsDetector/multiSlsDetector.cpp
index 755ed343f..5b52c58c9 100644
--- a/slsDetectorSoftware/multiSlsDetector/multiSlsDetector.cpp
+++ b/slsDetectorSoftware/multiSlsDetector/multiSlsDetector.cpp
@@ -4734,3 +4734,17 @@ int multiSlsDetector::setReadReceiverFrequency(int getFromReceiver,int i){
 
 
 
+int multiSlsDetector::enableReceiverCompression(int i){
+	int ret=-100,ret1;
+	for (int idet=0; idet<thisMultiDetector->numberOfDetectors; idet++)
+		if (detectors[idet]){
+			ret1=detectors[idet]->enableReceiverCompression(i);
+		    if(detectors[idet]->getErrorMask())
+			  setErrorMask(getErrorMask()|(1<<idet));
+			if(ret==-100)
+				ret=ret1;
+			else if (ret!=ret1)
+				ret=-1;
+		}
+	return ret;
+}
diff --git a/slsDetectorSoftware/multiSlsDetector/multiSlsDetector.h b/slsDetectorSoftware/multiSlsDetector/multiSlsDetector.h
index 8351c7b67..6c40daeb5 100644
--- a/slsDetectorSoftware/multiSlsDetector/multiSlsDetector.h
+++ b/slsDetectorSoftware/multiSlsDetector/multiSlsDetector.h
@@ -1209,6 +1209,12 @@ class multiSlsDetector  : public slsDetectorUtils {
   /** updates the multidetector offsets */
   void updateOffsets();
 
+  /** enable/disable or get data compression in receiver
+   * @param i is -1 to get, 0 to disable and 1 to enable
+     /returns data compression in receiver
+   */
+  int enableReceiverCompression(int i = -1);
+
 
 
  protected:
diff --git a/slsDetectorSoftware/slsDetector/slsDetector.cpp b/slsDetectorSoftware/slsDetector/slsDetector.cpp
index 0f3cc3368..5ff831ed0 100644
--- a/slsDetectorSoftware/slsDetector/slsDetector.cpp
+++ b/slsDetectorSoftware/slsDetector/slsDetector.cpp
@@ -6486,3 +6486,21 @@ int slsDetector::setReadReceiverFrequency(int getFromReceiver,int i){
 }
 
 
+int slsDetector::enableReceiverCompression(int i){
+	int fnum=F_ENABLE_COMPRESSION;
+	int ret = FAIL;
+	int retval=-1;
+
+
+	if(setReceiverOnline(ONLINE_FLAG)==ONLINE_FLAG){
+#ifdef VERBOSE
+		std::cout << "Getting/Enabling/Disabling Receiver Compression with argument " << i << std::endl;
+#endif
+		if (connectData() == OK)
+			ret=thisReceiver->sendInt(fnum,retval,i);
+		if(ret==FAIL)
+			setErrorMask((getErrorMask())|(COULDNOT_ENABLE_COMPRESSION));
+	}
+	return retval;
+}
+
diff --git a/slsDetectorSoftware/slsDetector/slsDetector.h b/slsDetectorSoftware/slsDetector/slsDetector.h
index 219bc0bbf..fdfa0f70b 100644
--- a/slsDetectorSoftware/slsDetector/slsDetector.h
+++ b/slsDetectorSoftware/slsDetector/slsDetector.h
@@ -1609,6 +1609,12 @@ class slsDetector : public slsDetectorUtils, public energyConversion {
    */
   int setReadReceiverFrequency(int getFromReceiver, int i=-1);
 
+  /** enable/disable or get data compression in receiver
+   * @param i is -1 to get, 0 to disable and 1 to enable
+     /returns data compression in receiver
+   */
+  int enableReceiverCompression(int i = -1);
+
 
  protected:
  
diff --git a/slsDetectorSoftware/slsDetector/slsDetectorCommand.cpp b/slsDetectorSoftware/slsDetector/slsDetectorCommand.cpp
index 5b09c029d..9c22864e2 100644
--- a/slsDetectorSoftware/slsDetector/slsDetectorCommand.cpp
+++ b/slsDetectorSoftware/slsDetector/slsDetectorCommand.cpp
@@ -847,6 +847,11 @@ slsDetectorCommand::slsDetectorCommand(slsDetectorUtils *det)  {
   descrToFuncMap[i].m_pFuncPtr=&slsDetectorCommand::cmdReceiver;
   i++;
 
+  descrToFuncMap[i].m_pFuncName="r_compression"; //
+  descrToFuncMap[i].m_pFuncPtr=&slsDetectorCommand::cmdReceiver;
+  i++;
+
+
   numberOfCommands=i;
   
   // #ifdef VERBOSE
@@ -4005,6 +4010,17 @@ string slsDetectorCommand::cmdReceiver(int narg, char *args[], int action) {
 	  sprintf(answer,"%d",myDet->setReadReceiverFrequency(1));
 	  return string(answer);
 
+  }
+  else if(cmd=="r_compression"){
+	  if (action==PUT_ACTION){
+		  if (!sscanf(args[1],"%d",&ival))
+			  return string("Could not scan receiver compression input ")+string(args[1]);
+		  if(ival>=0)
+			  sprintf(answer,"%d",myDet->enableReceiverCompression(ival));
+	  }else
+		  sprintf(answer,"%d",myDet->enableReceiverCompression());
+	  return string(answer);
+
   }
 
 
diff --git a/slsDetectorSoftware/slsDetector/slsDetectorUtils.h b/slsDetectorSoftware/slsDetector/slsDetectorUtils.h
index e80d8deed..ea8afd5b0 100644
--- a/slsDetectorSoftware/slsDetector/slsDetectorUtils.h
+++ b/slsDetectorSoftware/slsDetector/slsDetectorUtils.h
@@ -683,7 +683,11 @@ virtual ROI* getROI(int &n)=0;
 virtual int setReadReceiverFrequency(int getFromReceiver, int i=-1)=0;
 
 
-
+/** enable/disable or get data compression in receiver
+ * @param i is -1 to get, 0 to disable and 1 to enable
+   /returns data compression in receiver
+ */
+virtual int enableReceiverCompression(int i = -1)=0;
 
   protected:
 
diff --git a/slsDetectorSoftware/slsReceiver/slsReceiverFunctionList.cpp b/slsDetectorSoftware/slsReceiver/slsReceiverFunctionList.cpp
index f4d7e5d6d..a6edbbda1 100644
--- a/slsDetectorSoftware/slsReceiver/slsReceiverFunctionList.cpp
+++ b/slsDetectorSoftware/slsReceiver/slsReceiverFunctionList.cpp
@@ -77,6 +77,8 @@ slsReceiverFunctionList::slsReceiverFunctionList(detectorType det):
 					sfilefd(NULL),
 					writerthreads_mask(0x0),
 					listening_thread_running(0),
+					killListeningThread(0),
+					killAllWritingThreads(0),
 					cbAction(DO_EVERYTHING),
 					startAcquisitionCallBack(NULL),
 					pStartAcquisition(NULL),
@@ -317,8 +319,8 @@ int64_t slsReceiverFunctionList::setAcquisitionPeriod(int64_t index){
 
 
 
-/******************* need to look at exit strategy **************************/
-void slsReceiverFunctionList::enableDataCompression(bool enable){
+
+int slsReceiverFunctionList::enableDataCompression(bool enable){
 	cout << "Data compression ";
 	if(enable)
 		cout << "enabled" << endl;
@@ -341,13 +343,15 @@ void slsReceiverFunctionList::enableDataCompression(bool enable){
 
 	if(createWriterThreads() == FAIL){
 		cout << "ERROR: Could not create writer threads" << endl;
-		exit (-1);
+		return FAIL;
 	}
 	setThreadPriorities();
 
 
 	if(enable)
 		setupFilter();
+
+	return OK;
 }
 
 
@@ -583,15 +587,18 @@ int slsReceiverFunctionList::createUDPSocket(){
 
 
 int slsReceiverFunctionList::createListeningThreads(bool destroy){
+	void* status;
+
+	killListeningThread = 0;
+
+	pthread_mutex_lock(&status_mutex);
+	listening_thread_running = 0;
+	pthread_mutex_unlock(&(status_mutex));
 
 	if(!destroy){
-		pthread_mutex_lock(&status_mutex);
-		listening_thread_running = 0;
-		pthread_mutex_unlock(&(status_mutex));
-
 		//listening thread
 		cout << "Creating Listening Thread" << endl;
-		sem_init(&listensmp,0,0);
+		sem_init(&listensmp,0,1);
 		if(pthread_create(&listening_thread, NULL,startListeningThread, (void*) this)){
 			cout << "Could not create listening thread" << endl;
 			return FAIL;
@@ -601,11 +608,12 @@ int slsReceiverFunctionList::createListeningThreads(bool destroy){
 #endif
 	}else{
 		cout<<"Destroying Listening Thread"<<endl;
+		killListeningThread = 1;
 		sem_post(&listensmp);
-		sem_destroy(&listensmp);
-		cout << "Threads destroyed" << endl;
-		if(pthread_cancel(listening_thread)!=0)
-			cout << "Unable to cancel listening Thread " << endl;
+		pthread_join(listening_thread, &status);
+		killListeningThread = 0;
+		cout << "Listening thread destroyed" << endl;
+
 	}
 
 	return OK;
@@ -619,21 +627,24 @@ int slsReceiverFunctionList::createListeningThreads(bool destroy){
 
 int slsReceiverFunctionList::createWriterThreads(bool destroy){
 	int i;
+	void* status;
+
+	killAllWritingThreads = 0;
+
+	pthread_mutex_lock(&status_mutex);
+	writerthreads_mask = 0x0;
+	pthread_mutex_unlock(&(status_mutex));
+
 
 	if(!destroy){
 
-		pthread_mutex_lock(&status_mutex);
-		writerthreads_mask = 0x0;
-		pthread_mutex_unlock(&(status_mutex));
-
-
 		//start writer threads
 		cout << "Creating Writer Threads";
 
 		currentWriterThreadIndex = -1;
 
 		for(i = 0; i < numWriterThreads; ++i){
-			sem_init(&writersmp[i],0,0);
+			sem_init(&writersmp[i],0,1);
 			thread_started = 0;
 			currentWriterThreadIndex = i;
 			if(pthread_create(&writing_thread[i], NULL,startWritingThread, (void*) this)){
@@ -652,12 +663,14 @@ int slsReceiverFunctionList::createWriterThreads(bool destroy){
 
 	}else{
 		cout << "Destroying Writer Thread" << endl;
+		killAllWritingThreads = 1;
 		for(i = 0; i < numWriterThreads; ++i){
 			sem_post(&writersmp[i]);
-			sem_destroy(&writersmp[i]);
-			if(pthread_cancel(writing_thread[i])!=0)
-				cout << "Unable to cancel Thread of index" << i << endl;
+			pthread_join(writing_thread[i],&status);
+			cout <<"."<<flush;
 		}
+		killAllWritingThreads = 0;
+		cout << endl << "Writer threads destroyed" << endl;
 	}
 
 	return OK;
@@ -714,9 +727,11 @@ int slsReceiverFunctionList::setupWriter(){
 	guiDataReady=0;
 	strcpy(guiFileName,"");
 	cbAction = DO_EVERYTHING;
-	writerthreads_mask = 0x0;
 	int ret,ret1 = OK;
 
+	pthread_mutex_lock(&status_mutex);
+	writerthreads_mask = 0x0;
+	pthread_mutex_unlock(&status_mutex);
 
 	//printouts
 	cout << "Max Packets Per File:" << maxPacketsPerFile << endl;
@@ -745,7 +760,9 @@ int slsReceiverFunctionList::setupWriter(){
 		ret = createNewFile();
 	else{
 		for(int i=0;i<numWriterThreads;i++){
+			pthread_mutex_lock(&write_mutex);
 			ret1 = createCompressionFile(i,0);
+			pthread_mutex_unlock(&write_mutex);
 			if(ret1 == FAIL)
 				ret = FAIL;
 		}
@@ -845,6 +862,9 @@ int slsReceiverFunctionList::createNewFile(){
 
 
 void slsReceiverFunctionList::closeFile(int ithr){
+#ifdef VERBOSE
+	cout << "In closeFile for thread " << ithr << endl;
+#endif
 	if(!dataCompression){
 		//close file
 		if(sfilefd){
@@ -936,8 +956,14 @@ int slsReceiverFunctionList::startReceiver(char message[]){
 
 	//start listening /writing
 	sem_post(&listensmp);
+
+	/*int k;*/
+
 	for(int i=0; i < numWriterThreads; ++i){
+
+		/*sem_getvalue(&writersmp[i],&k);*/
 		sem_post(&writersmp[i]);
+		/*sem_getvalue(&writersmp[i],&k);*/
 	}
 	cout << "Receiver Started.\nStatus:" << status << endl;
 
@@ -1207,6 +1233,9 @@ int slsReceiverFunctionList::startListening(){
 
 		sem_wait(&listensmp);
 
+		//make sure its not exiting thread
+		if(killListeningThread)
+			pthread_exit(NULL);
 	}
 
 	return OK;
@@ -1260,13 +1289,15 @@ int slsReceiverFunctionList::startWriting(){
 
 
 		while((1<<ithread)&writerthreads_mask){
-
+#ifdef VERYDEBUG
+			cout << ithread << " ***waiting to pop out of fifo" << endl;
+#endif
 			//pop
 			fifo->pop(wbuf);
 			numpackets =	(uint16_t)(*((uint16_t*)wbuf));
 #ifdef VERYDEBUG
-			cout << "numpackets:" << dec << numpackets << endl;
-			cout << ithread << "*** popped from fifo " << numpackets << endl;
+			cout << ithread << " numpackets:" << dec << numpackets << endl;
+			cout << ithread << " *** popped from fifo " << numpackets << endl;
 #endif
 
 
@@ -1277,23 +1308,25 @@ int slsReceiverFunctionList::startWriting(){
 			//last dummy packet
 			if(numpackets == 0xFFFF){
 #ifdef VERYDEBUG
-				cout << "**********************popped last dummy frame:" << (void*)wbuf << "  from thread " << ithread << endl;
+				cout << ithread << " **********************popped last dummy frame:" << (void*)wbuf << endl;
 #endif
 
 				//free fifo
 				while(!fifoFree->push(wbuf));
 #ifdef VERYDEBUG
-				cout << "fifo freed:" << (void*)wbuf << "  from thread " << ithread << endl;
+				cout << ithread  << " fifo freed:" << (void*)wbuf << endl;
 #endif
 
 
 
 				//all threads need to close file, reset mask and exit loop
-				pthread_mutex_lock(&status_mutex);
+				pthread_mutex_lock(&write_mutex);
 				closeFile(ithread);
+				pthread_mutex_unlock(&write_mutex);
+				pthread_mutex_lock(&status_mutex);
 				writerthreads_mask^=(1<<ithread);
 #ifdef VERYDEBUG
-				cout <<"Resetting mask of current thread " << ithread << ". New Mask: " << writerthreads_mask << endl;
+				cout << ithread << " Resetting mask of current thread. New Mask: " << writerthreads_mask << endl;
 #endif
 				pthread_mutex_unlock(&status_mutex);
 
@@ -1303,7 +1336,7 @@ int slsReceiverFunctionList::startWriting(){
 				//change status to run finished
 				if(ithread == 0){
 					if(dataCompression){
-						cout<<"Waiting for jobs to be done.. current mask:"<< hex << writerthreads_mask <<endl;
+						cout << "Waiting for jobs to be done.. current mask:" << hex << writerthreads_mask << endl;
 						while(writerthreads_mask){
 							/*cout << "." << flush;*/
 							usleep(50000);
@@ -1423,7 +1456,9 @@ int slsReceiverFunctionList::startWriting(){
 									if (thisEvent==PHOTON_MAX) {
 
 										iFrame=receiverdata[ithread]->getFrameNumber(buff);
+										pthread_mutex_lock(&write_mutex);
 										myTree[ithread]->Fill();
+										pthread_mutex_unlock(&write_mutex);
 										//cout << "Fill in event: frmNr: " << iFrame <<  " ix " << ix << " iy " << iy << " type " <<  thisEvent << endl;
 									}
 								}
@@ -1431,13 +1466,13 @@ int slsReceiverFunctionList::startWriting(){
 
 						nf++;
 
-						pthread_mutex_lock(&write_mutex);
+						pthread_mutex_lock(&progress_mutex);
 
 						packetsInFile += packetsPerFrame;
 						packetsCaught += packetsPerFrame;
 						totalPacketsCaught += packetsPerFrame;
 
-						pthread_mutex_unlock(&write_mutex);
+						pthread_mutex_unlock(&progress_mutex);
 						if(!once){
 							copyFrameToGui(buff);
 							once = 1;
@@ -1460,9 +1495,16 @@ int slsReceiverFunctionList::startWriting(){
 			}
 		}
 
+		/*int k;
+		sem_getvalue(&writersmp[ithread],&k);
+		cout<<ithread<<" waiting for sem:"<<k <<endl;*/
 		//wait
 		sem_wait(&writersmp[ithread]);
 
+		if(killAllWritingThreads)
+			pthread_exit(NULL);
+
+
 	}
 
 
@@ -1472,6 +1514,15 @@ int slsReceiverFunctionList::startWriting(){
 
 
 
+
+
+
+
+
+
+
+
+
 void slsReceiverFunctionList::writeToFile_withoutCompression(char* buf,int numpackets){
 	int packetsToSave, offset,tempframenum,lastpacket;
 
diff --git a/slsDetectorSoftware/slsReceiver/slsReceiverFunctionList.h b/slsDetectorSoftware/slsReceiver/slsReceiverFunctionList.h
index 5ea74cf5d..9b51357cb 100644
--- a/slsDetectorSoftware/slsReceiver/slsReceiverFunctionList.h
+++ b/slsDetectorSoftware/slsReceiver/slsReceiverFunctionList.h
@@ -168,8 +168,9 @@ public:
 	int64_t setAcquisitionPeriod(int64_t index);
 
 	/** enabl data compression, by saving only hits
+	 /returns if failed
 	 */
-	void enableDataCompression(bool enable);
+	int enableDataCompression(bool enable);
 
 	/** get data compression, by saving only hits
 	 */
@@ -465,8 +466,27 @@ private:
 	/** total frame count the listening thread has listened to */
 	int totalListeningFrameCount;
 
+	/** mask showing which threads are running */
+	volatile uint32_t writerthreads_mask;
+
+	/** 0 if listening thread is idle, 1 otherwise */
+	int listening_thread_running;
+
+	/** variable used to self terminate threads waiting for semaphores */
+	int killListeningThread;
+
+	/** variable used to self terminate threads waiting for semaphores */
+	int killAllWritingThreads;
 
 
+//filter
+		singlePhotonDetector<uint16_t> *singlePhotonDet[MAX_NUM_WRITER_THREADS];
+
+		slsReceiverData<uint16_t>  *receiverdata[MAX_NUM_WRITER_THREADS];
+
+		moenchCommonMode *cmSub;
+
+		bool commonModeSubtractionEnable;
 
 
 //semaphores
@@ -477,6 +497,7 @@ private:
 	/** semaphore to synchronize  writer threads */
 	sem_t writersmp[MAX_NUM_WRITER_THREADS];
 
+
 //mutex
 	/** guiDataReady mutex */
 	pthread_mutex_t  dataReadyMutex;
@@ -491,6 +512,20 @@ private:
 	pthread_mutex_t write_mutex;
 
 
+#ifdef MYROOT1
+	/** Tree where the hits are stored */
+	TTree *myTree[MAX_NUM_WRITER_THREADS];
+
+	/** File where the tree is saved */
+	TFile *myFile[MAX_NUM_WRITER_THREADS];
+#endif
+
+	/** File Descriptor */
+	FILE *sfilefd;
+
+
+
+
 	/**
 	   callback arguments are
 	   filepath
@@ -533,34 +568,9 @@ private:
 	 * 2 we open, close, write file, callback does not do anything */
 	int cbAction;
 
-	//filter
-		singlePhotonDetector<uint16_t> *singlePhotonDet[MAX_NUM_WRITER_THREADS];
-
-		slsReceiverData<uint16_t>  *receiverdata[MAX_NUM_WRITER_THREADS];
-
-		moenchCommonMode *cmSub;
-
-		bool commonModeSubtractionEnable;
 
 public:
 
-#ifdef MYROOT1
-	/** Tree where the hits are stored */
-	TTree *myTree[MAX_NUM_WRITER_THREADS];
-
-	/** File where the tree is saved */
-	TFile *myFile[MAX_NUM_WRITER_THREADS];
-#endif
-
-
-	/** File Descriptor */
-	FILE *sfilefd;
-
-	/** mask showing which threads are running */
-	volatile uint32_t writerthreads_mask;
-
-	/** 0 if listening thread is idle, 1 otherwise */
-	int listening_thread_running;
 
 	/**
 	   callback arguments are
diff --git a/slsDetectorSoftware/slsReceiver/slsReceiver_funcs.cpp b/slsDetectorSoftware/slsReceiver/slsReceiver_funcs.cpp
index aa073b9c8..341f0ced9 100644
--- a/slsDetectorSoftware/slsReceiver/slsReceiver_funcs.cpp
+++ b/slsDetectorSoftware/slsReceiver/slsReceiver_funcs.cpp
@@ -24,9 +24,6 @@ int slsReceiverFuncs::socketDescriptor(-1);
 
 
 slsReceiverFuncs::~slsReceiverFuncs() {
-	/*if(file_des != -1){close(file_des);file_des = -1;}
-	//shutdown(socketDescriptor,SHUT_RDWR);
-	close(socketDescriptor);*/
 	if(socket) delete socket;
 	closeFile(0);
 }
@@ -45,7 +42,6 @@ slsReceiverFuncs::slsReceiverFuncs(int argc, char *argv[], int &success):
 	string sLine,sargname;
 	int iline = 0;
 	bool dcompr = false;
-	/*int jobthread = -1;*/
 
 
 	success=OK;
@@ -115,9 +111,14 @@ slsReceiverFuncs::slsReceiverFuncs(int argc, char *argv[], int &success):
 							}
 						}
 					}
-
-
-
+					//compression
+					else if(sargname=="compression"){
+						if(sstr.good()) {
+							sstr >> sargname;
+							if((!strcasecmp(sargname.c_str(),"yes"))||(!strcasecmp(sargname.c_str(),"y")))
+								dcompr = true;
+						}
+					}
 				}
 			}
 			infile.close();
@@ -176,32 +177,15 @@ slsReceiverFuncs::slsReceiverFuncs(int argc, char *argv[], int &success):
 					cout << "no value given after -compression in command line. Exiting." << endl;
 					success=FAIL;
 				}else {
-					if(!strcasecmp(argv[iarg+1],"yes")){
+					if((!strcasecmp(argv[iarg+1],"yes"))||(!strcasecmp(argv[iarg+1],"y"))){
 						dcompr = true;
 						iarg++;
-				}else if(!strcasecmp(argv[iarg+1],"no")){
-						dcompr = true;
-						iarg++;
-					}else{
+				}else{
 						cout << "could not decode value for compression in command line. \n\nExiting." << endl;
 						success=FAIL;
 					}
 				}
 			}
-			/*//jobstothread
-			else if(!strcasecmp(argv[iarg],"-jobthread")){
-				if(iarg+1==argc){
-					cout << "no value given after -jobthread in command line. Exiting." << endl;
-					success=FAIL;
-				}else {
-					if(sscanf(argv[iarg+1],"%d",&jobthread)){
-						iarg++;
-					}else{
-						cout << "could not decode value for jobthread in command line. \n\nExiting." << endl;
-						success=FAIL;
-					}
-				}
-			}*/
 			else{
 				cout << "Unknown argument:" << argv[iarg] << endl;
 				success=FAIL;
@@ -232,7 +216,6 @@ slsReceiverFuncs::slsReceiverFuncs(int argc, char *argv[], int &success):
 		cout << "type:\t\t Type of receiver. Default: Gotthard. Options: Moench" << endl;
 		cout << "rx_tcpport:\t TCP Communication Port with the client. Default:1954. " << endl;
 		cout << "compression:\t Data Compression. Saving only hits. Option:yes, no" << endl << endl;;
-		/*cout << "jobthread:\t Number of jobs given to a thread for compression." << endl << endl;*/
 	}
 
 
@@ -256,8 +239,8 @@ slsReceiverFuncs::slsReceiverFuncs(int argc, char *argv[], int &success):
 			//Catch signal SIGINT to close files properly
 			signal(SIGINT,staticCloseFile);
 
-			/*if(dcompr)*/	slsReceiverList->enableDataCompression(dcompr);
-			/*if(jobthread!=-1) slsReceiverList->setNumberOfJobsPerThread(jobthread);*/
+			if(dcompr)
+				slsReceiverList->enableDataCompression(dcompr);
 
 #ifdef VERBOSE
 			cout << "Function table assigned." << endl;
@@ -326,7 +309,7 @@ int slsReceiverFuncs::function_table(){
 	flist[F_CONFIGURE_MAC]			=	&slsReceiverFuncs::set_short_frame;
 	flist[F_START_READOUT]			= 	&slsReceiverFuncs::start_readout;
 	flist[F_SET_TIMER]				= 	&slsReceiverFuncs::set_acquisition_period;
-
+	flist[F_ENABLE_COMPRESSION]		= 	&slsReceiverFuncs::enable_compression;
 
 	//General Functions
 	flist[F_LOCK_SERVER]			=	&slsReceiverFuncs::lock_receiver;
@@ -405,7 +388,7 @@ void slsReceiverFuncs::closeFile(int p){
 	cout<<"Closing Files... "<<endl;
 	slsReceiverList->closeFile();
 	cout << "Goodbye!" << endl;
-	exit(1);
+	exit(-1);
 }
 
 void slsReceiverFuncs::staticCloseFile(int p){
@@ -545,7 +528,7 @@ int slsReceiverFuncs::set_file_index() {
 	// execute action if the arguments correctly arrived
 #ifdef SLS_RECEIVER_FUNCTION_LIST
 	if (ret==OK) {
-		if (lockStatus==1 && socket->differentClients==1){//necessary???
+		if (lockStatus==1 && socket->differentClients==1){
 			sprintf(mess,"Receiver locked by %s\n", socket->lastClientIP);
 			ret=FAIL;
 		}
@@ -598,7 +581,7 @@ int slsReceiverFuncs::set_frame_index() {
 	// execute action if the arguments correctly arrived
 #ifdef SLS_RECEIVER_FUNCTION_LIST
 	if (ret==OK) {
-		if (lockStatus==1 && socket->differentClients==1){//necessary???
+		if (lockStatus==1 && socket->differentClients==1){
 			sprintf(mess,"Receiver locked by %s\n", socket->lastClientIP);
 			ret=FAIL;
 		}
@@ -655,7 +638,7 @@ int slsReceiverFuncs::setup_udp(){
 	// execute action if the arguments correctly arrived
 #ifdef SLS_RECEIVER_FUNCTION_LIST
 	if (ret==OK) {
-		if (lockStatus==1 && socket->differentClients==1){//necessary???
+		if (lockStatus==1 && socket->differentClients==1){
 			sprintf(mess,"Receiver locked by %s\n", socket->lastClientIP);
 			ret=FAIL;
 		}
@@ -922,7 +905,7 @@ int slsReceiverFuncs::set_short_frame() {
 	// execute action if the arguments correctly arrived
 #ifdef SLS_RECEIVER_FUNCTION_LIST
 	if (ret==OK) {
-		if (lockStatus==1 && socket->differentClients==1){//necessary???
+		if (lockStatus==1 && socket->differentClients==1){
 			sprintf(mess,"Receiver locked by %s\n", socket->lastClientIP);
 			ret=FAIL;
 		}
@@ -1301,7 +1284,7 @@ int slsReceiverFuncs::set_read_frequency(){
 	// execute action if the arguments correctly arrived
 #ifdef SLS_RECEIVER_FUNCTION_LIST
 	if (ret==OK) {
-		if (lockStatus==1 && socket->differentClients==1){//necessary???
+		if (lockStatus==1 && socket->differentClients==1){
 			sprintf(mess,"Receiver locked by %s\n", socket->lastClientIP);
 			ret=FAIL;
 		}/*
@@ -1351,7 +1334,7 @@ int slsReceiverFuncs::enable_file_write(){
 	// execute action if the arguments correctly arrived
 #ifdef SLS_RECEIVER_FUNCTION_LIST
 	if (ret==OK) {
-		if (lockStatus==1 && socket->differentClients==1){//necessary???
+		if (lockStatus==1 && socket->differentClients==1){
 			sprintf(mess,"Receiver locked by %s\n", socket->lastClientIP);
 			ret=FAIL;
 		}
@@ -1453,7 +1436,7 @@ int slsReceiverFuncs::set_acquisition_period() {
 	// execute action if the arguments correctly arrived
 #ifdef SLS_RECEIVER_FUNCTION_LIST
 	if (ret==OK) {
-		if (lockStatus==1 && socket->differentClients==1){//necessary???
+		if (lockStatus==1 && socket->differentClients==1){
 			sprintf(mess,"Receiver locked by %s\n", socket->lastClientIP);
 			ret=FAIL;
 		}
@@ -1488,6 +1471,53 @@ int slsReceiverFuncs::set_acquisition_period() {
 
 
 
+int slsReceiverFuncs::enable_compression() {
+	ret=OK;
+	int enable=-1;
+	int retval=-100;
+	strcpy(mess,"Could not enable/disable compression for receiver\n");
+
+	// receive arguments
+	if(socket->ReceiveDataOnly(&enable,sizeof(enable)) < 0 ){
+		strcpy(mess,"Error reading from socket\n");
+		ret = FAIL;
+	}
+
+
+	// execute action if the arguments correctly arrived
+#ifdef SLS_RECEIVER_FUNCTION_LIST
+	if (ret==OK) {
+		if(enable >= 0){
+			if (lockStatus==1 && socket->differentClients==1){
+				sprintf(mess,"Receiver locked by %s\n", socket->lastClientIP);
+				ret=FAIL;
+			}
+			else if(slsReceiverList->getStatus()==RUNNING){
+				strcpy(mess,"Cannot enable/disable compression while status is running\n");
+				ret=FAIL;
+			}
+			else
+				ret = slsReceiverList->enableDataCompression(enable);
+		}
+
+		retval=slsReceiverList->getDataCompression();
+	}
+#endif
+
+	if(ret==OK && socket->differentClients){
+		cout << "Force update" << endl;
+		ret=FORCE_UPDATE;
+	}
+
+	// send answer
+	socket->SendDataOnly(&ret,sizeof(ret));
+	if(ret==FAIL)
+		socket->SendDataOnly(mess,sizeof(mess));
+	socket->SendDataOnly(&retval,sizeof(retval));
+
+	//return ok/fail
+	return ret;
+}
 
 
 
diff --git a/slsDetectorSoftware/slsReceiver/slsReceiver_funcs.h b/slsDetectorSoftware/slsReceiver/slsReceiver_funcs.h
index 33a6ed0b8..a8b8ae726 100644
--- a/slsDetectorSoftware/slsReceiver/slsReceiver_funcs.h
+++ b/slsDetectorSoftware/slsReceiver/slsReceiver_funcs.h
@@ -154,6 +154,9 @@ public:
 	/** set acquisition period to find the value of n */
 	int set_acquisition_period();
 
+	/** enable compression */
+	int enable_compression();
+
 
 	//General Functions
 	/** Locks Receiver */