diff --git a/serverBin/gotthardDetectorServerv4.0.0.0 b/serverBin/gotthardDetectorServerv4.0.0.0
deleted file mode 120000
index 50e12c935..000000000
--- a/serverBin/gotthardDetectorServerv4.0.0.0
+++ /dev/null
@@ -1 +0,0 @@
-../slsDetectorSoftware/gotthardDetectorServer/gotthardDetectorServerv4.0.0.0
\ No newline at end of file
diff --git a/serverBin/gotthardDetectorServerv4.0.0.1 b/serverBin/gotthardDetectorServerv4.0.0.1
new file mode 120000
index 000000000..337eccaed
--- /dev/null
+++ b/serverBin/gotthardDetectorServerv4.0.0.1
@@ -0,0 +1 @@
+../slsDetectorSoftware/gotthardDetectorServer/gotthardDetectorServerv4.0.0.1
\ No newline at end of file
diff --git a/slsDetectorSoftware/commonFiles/versionAPI.h b/slsDetectorSoftware/commonFiles/versionAPI.h
index 6dae9daa0..13f1e1d5a 100644
--- a/slsDetectorSoftware/commonFiles/versionAPI.h
+++ b/slsDetectorSoftware/commonFiles/versionAPI.h
@@ -2,4 +2,4 @@
 #define APIRECEIVER 0x180718
 #define APIEIGER 0x180820
 #define APIJUNGFRAU 0x180820
-#define APIGOTTHARD 0x180820
+#define APIGOTTHARD 0x180918
diff --git a/slsDetectorSoftware/gotthardDetectorServer/Makefile b/slsDetectorSoftware/gotthardDetectorServer/Makefile
index a5f1667a6..b43f65031 100755
--- a/slsDetectorSoftware/gotthardDetectorServer/Makefile
+++ b/slsDetectorSoftware/gotthardDetectorServer/Makefile
@@ -31,6 +31,7 @@ versioning:
 $(PROGS): $(OBJS)
 #	echo $(OBJS)
 	$(CC) $(CFLAGS) -o $@ $^ $(LDLIBS_$@) $(LDFLAGS_$@)
+	rm gotthardDetectorServer.gdb
 
 
 install:	$(PROGS)
diff --git a/slsDetectorSoftware/gotthardDetectorServer/firmware_funcs.c b/slsDetectorSoftware/gotthardDetectorServer/firmware_funcs.c
index 312165ef1..5e28d88a6 100755
--- a/slsDetectorSoftware/gotthardDetectorServer/firmware_funcs.c
+++ b/slsDetectorSoftware/gotthardDetectorServer/firmware_funcs.c
@@ -1261,6 +1261,7 @@ int setADC(int adc){
 
 int configureMAC(int ipad,long long int macad,long long int detectormacad, int detipad, int ival, int udpport){
 
+	startReceiver(1);
 
 #ifdef DDEBUG
 	printf("Chip of Intrst Reg:%x\n",bus_r(CHIP_OF_INTRST_REG));
diff --git a/slsDetectorSoftware/gotthardDetectorServer/gitInfo.txt b/slsDetectorSoftware/gotthardDetectorServer/gitInfo.txt
index 2f5bf5ec9..485b59dec 100644
--- a/slsDetectorSoftware/gotthardDetectorServer/gitInfo.txt
+++ b/slsDetectorSoftware/gotthardDetectorServer/gitInfo.txt
@@ -1,9 +1,9 @@
 Path: slsDetectorsPackage/slsDetectorSoftware/gotthardDetectorServer 
 URL: origin git@github.com:slsdetectorgroup/slsDetectorPackage.git 
 Repository Root: origin git@github.com:slsdetectorgroup/slsDetectorPackage.git 
-Repsitory UUID: 63c130a3806b47332b1532ab00f9f344c5839e0e 
-Revision: 236 
-Branch: 4.0.0-rc 
+Repsitory UUID: 255931bbde2721a1d7ddf3422ba9ee79ec7655f5 
+Revision: 237 
+Branch: 4.0.0 
 Last Changed Author: Dhanya_Thattil 
-Last Changed Rev: 3986 
-Last Changed Date: 2018-08-20 11:38:13.000000002 +0200 ./server_funcs.h
+Last Changed Rev: 4000 
+Last Changed Date: 2018-09-18 17:37:25.000000002 +0200 ./server_funcs.c
diff --git a/slsDetectorSoftware/gotthardDetectorServer/gitInfoGotthard.h b/slsDetectorSoftware/gotthardDetectorServer/gitInfoGotthard.h
index 7a917f824..e5944cb43 100644
--- a/slsDetectorSoftware/gotthardDetectorServer/gitInfoGotthard.h
+++ b/slsDetectorSoftware/gotthardDetectorServer/gitInfoGotthard.h
@@ -1,6 +1,6 @@
 #define GITURL "git@github.com:slsdetectorgroup/slsDetectorPackage.git"
-#define GITREPUUID "63c130a3806b47332b1532ab00f9f344c5839e0e"
+#define GITREPUUID "255931bbde2721a1d7ddf3422ba9ee79ec7655f5"
 #define GITAUTH "Dhanya_Thattil"
-#define GITREV 0x3986
-#define GITDATE 0x20180820
-#define GITBRANCH "4.0.0-rc"
+#define GITREV 0x4000
+#define GITDATE 0x20180918
+#define GITBRANCH "4.0.0"
diff --git a/slsDetectorSoftware/gotthardDetectorServer/gotthardDetectorServer_virtual b/slsDetectorSoftware/gotthardDetectorServer/gotthardDetectorServer_virtual
index 05e41e470..bb670e711 100755
Binary files a/slsDetectorSoftware/gotthardDetectorServer/gotthardDetectorServer_virtual and b/slsDetectorSoftware/gotthardDetectorServer/gotthardDetectorServer_virtual differ
diff --git a/slsDetectorSoftware/gotthardDetectorServer/gotthardDetectorServerv4.0.0.0 b/slsDetectorSoftware/gotthardDetectorServer/gotthardDetectorServerv4.0.0.0
deleted file mode 100755
index 6d9ea118f..000000000
Binary files a/slsDetectorSoftware/gotthardDetectorServer/gotthardDetectorServerv4.0.0.0 and /dev/null differ
diff --git a/slsDetectorSoftware/gotthardDetectorServer/gotthardDetectorServerv4.0.0.1 b/slsDetectorSoftware/gotthardDetectorServer/gotthardDetectorServerv4.0.0.1
new file mode 100755
index 000000000..6e2053f3c
Binary files /dev/null and b/slsDetectorSoftware/gotthardDetectorServer/gotthardDetectorServerv4.0.0.1 differ
diff --git a/slsDetectorSoftware/gotthardDetectorServer/mcb_funcs.c b/slsDetectorSoftware/gotthardDetectorServer/mcb_funcs.c
index 3e16ddc2e..79879e4d1 100755
--- a/slsDetectorSoftware/gotthardDetectorServer/mcb_funcs.c
+++ b/slsDetectorSoftware/gotthardDetectorServer/mcb_funcs.c
@@ -2486,7 +2486,7 @@ ROI* setROI(int n, ROI arg[], int *retvalsize, int *ret){
 				}
 			}
 		}
-
+		printf("\tGoing to enable adc: %d\n", adc);
 
 		//set rois for just 1 adc - take only 1st roi
 		if(adc!=-1){
@@ -2495,10 +2495,14 @@ ROI* setROI(int n, ROI arg[], int *retvalsize, int *ret){
 			rois[0].ymin=-1;
 			rois[0].ymax=-1;
 			nROI = 1;
+			printf("\tActual xmin:%d xmax:%d\n",rois[0].xmin,rois[0].xmax);
 		}else
 			nROI = 0;
 
-		if((arg[0].xmin!=rois[0].xmin)||(arg[0].xmax!=rois[0].xmax)||(arg[0].ymin!=rois[0].ymin)||(arg[0].ymax!=rois[0].ymax))
+		if((n!=0) && ((arg[0].xmin!=rois[0].xmin)||
+				(arg[0].xmax!=rois[0].xmax)||
+				(arg[0].ymin!=rois[0].ymin)||
+				(arg[0].ymax!=rois[0].ymax)))
 			*ret=FAIL;
 		if(n!=nROI)
 			*ret=FAIL;
@@ -2508,9 +2512,11 @@ ROI* setROI(int n, ROI arg[], int *retvalsize, int *ret){
 	}
 
 //#ifdef VERBOSE
-	printf("Rois:\n");
-	for( i=0;i<nROI;i++)
-		printf("%d\t%d\t%d\t%d\n",rois[i].xmin,rois[i].xmax,rois[i].ymin,rois[i].ymax);
+	if (nROI) {
+		printf("Rois:\n");
+		for( i=0;i<nROI;i++)
+			printf("\t%d\t%d\t%d\t%d\n\n",rois[i].xmin,rois[i].xmax,rois[i].ymin,rois[i].ymax);
+	}else printf("Rois: 0\n\n");
 //#endif
 	*retvalsize = nROI;
 	return rois;
diff --git a/slsDetectorSoftware/gotthardDetectorServer/server_defs.h b/slsDetectorSoftware/gotthardDetectorServer/server_defs.h
index 6dc6bf59d..fd2ae00e6 100755
--- a/slsDetectorSoftware/gotthardDetectorServer/server_defs.h
+++ b/slsDetectorSoftware/gotthardDetectorServer/server_defs.h
@@ -47,8 +47,8 @@
 #define DEFAULT_PHASE_SHIFT			120
 #define DEFAULT_IP_PACKETSIZE		0x0522
 #define DEFAULT_UDP_PACKETSIZE		0x050E
-#define ADC1_IP_PACKETSIZE			256*2+14+20
-#define ADC1_UDP_PACKETSIZE			256*2+4+8+2
+#define ADC1_IP_PACKETSIZE			(256*2+14+20)
+#define ADC1_UDP_PACKETSIZE			(256*2+4+8+2)
 
 #ifdef VIRTUAL
 #define DEBUGOUT
diff --git a/slsDetectorSoftware/gotthardDetectorServer/server_funcs.c b/slsDetectorSoftware/gotthardDetectorServer/server_funcs.c
index 912c137a1..2099f32b0 100755
--- a/slsDetectorSoftware/gotthardDetectorServer/server_funcs.c
+++ b/slsDetectorSoftware/gotthardDetectorServer/server_funcs.c
@@ -103,6 +103,7 @@ int init_detector( int b) {
     setSynchronization(GET_SYNCHRONIZATION_MODE);
     startReceiver(0);
     setMasterSlaveConfiguration();
+    setADC(-1);
   }
   strcpy(mess,"dummy message");
   strcpy(lastClientIP,"none");
@@ -2341,9 +2342,9 @@ int set_roi(int file_des) {
 			  ret=FAIL;
 		  }
 		  //#ifdef VERBOSE
-		  printf("Setting ROI to:");
+		  printf("\n\nSetting ROI: nroi=%d\n",nroi);
 		  for( i=0;i<nroi;i++)
-			  printf("%d\t%d\t%d\t%d\n",arg[i].xmin,arg[i].xmax,arg[i].ymin,arg[i].ymax);
+			  printf("\t%d\t%d\t%d\t%d\n",arg[i].xmin,arg[i].xmax,arg[i].ymin,arg[i].ymax);
 		  //#endif
 	  }
 	  /* execute action if the arguments correctly arrived*/
diff --git a/slsDetectorSoftware/slsDetector/slsDetector.cpp b/slsDetectorSoftware/slsDetector/slsDetector.cpp
index ce2fcbb74..a66588bc2 100644
--- a/slsDetectorSoftware/slsDetector/slsDetector.cpp
+++ b/slsDetectorSoftware/slsDetector/slsDetector.cpp
@@ -3949,7 +3949,7 @@ int slsDetector::readAllNoWait() {
 int slsDetector::configureMAC() {
 	int i;
 	int ret=FAIL;
-	int fnum=F_CONFIGURE_MAC,fnum2=F_RECEIVER_SHORT_FRAME;
+	int fnum=F_CONFIGURE_MAC;
 	char mess[MAX_STR_LENGTH]="";
 	char arg[6][50];memset(arg,0,sizeof(char)*6*50);
 	int retval=-1;
@@ -4150,24 +4150,19 @@ int slsDetector::configureMAC() {
 		setErrorMask((getErrorMask())|(COULD_NOT_CONFIGURE_MAC));
 	}
 	else if (thisDetector->myDetectorType==GOTTHARD){
-		//set frames per file - only for gotthard
-		pthread_mutex_lock(&ms);
-		if(retval==-1)
-			setFramesPerFile(MAX_FRAMES_PER_FILE);
-		else
-			setFramesPerFile(SHORT_MAX_FRAMES_PER_FILE);
-		pthread_mutex_unlock(&ms);
-		//connect to receiver
+
+		// update roi in update receiver
 		if(thisDetector->receiverOnlineFlag==ONLINE_FLAG){
+			int fnum=F_RECEIVER_SHORT_FRAME;
 #ifdef VERBOSE
 			std::cout << "Sending adc val to receiver " << retval << std::endl;
 #endif
 			if (connectData() == OK){
-				ret=thisReceiver->sendInt(fnum2,retval,retval);
+				ret=thisReceiver->sendInt(fnum,retval,retval);
 				disconnectData();
 			}
 			if(ret==FAIL)
-				setErrorMask((getErrorMask())|(COULD_NOT_CONFIGURE_MAC));
+				setErrorMask((getErrorMask())|(COULDNOT_SET_ROI));
 		}
 	}
 
@@ -6132,17 +6127,23 @@ int slsDetector::sendROI(int n,ROI roiLimits[]) {
 	}
 
 	//update client
-	if(ret!=FAIL){
+	if(ret==FAIL){
+		setErrorMask((getErrorMask())|(COULDNOT_SET_ROI));
+	} else {
 		for(int i=0;i<retvalsize;++i)
 			thisDetector->roiLimits[i]=retval[i];
 		thisDetector->nROI = retvalsize;
 	}
 
-	//#ifdef VERBOSE
+#ifdef VERBOSE
 	for(int j=0;j<thisDetector->nROI;++j)
-		cout<<"get"<< roiLimits[j].xmin<<"\t"<<roiLimits[j].xmax<<"\t"
-		<<roiLimits[j].ymin<<"\t"<<roiLimits[j].ymax<<endl;
-	//#endif
+		cout<<"ROI [" <<j<<"] ("<< roiLimits[j].xmin<<"\t"<<roiLimits[j].xmax<<"\t"
+		<<roiLimits[j].ymin<<"\t"<<roiLimits[j].ymax<<")"<<endl;
+#endif
+
+	// update receiver
+	if (thisDetector->myDetectorType == GOTTHARD)
+		configureMAC();
 
 	return ret;
 }
@@ -9026,13 +9027,6 @@ int slsDetector::startReceiver() {
 		}
 	}
 
-
-	// tell detector to send to receiver (if start receiver failed, this is not executed)
-	if(((thisDetector->myDetectorType == GOTTHARD ||
-			thisDetector->myDetectorType == PROPIX)  && ret!= FAIL))
-		return prepareAcquisition(); // send data to receiver for these detectors
-
-
 	return ret;
 }
 
@@ -9044,11 +9038,6 @@ int slsDetector::stopReceiver() {
 	int ret = FAIL;
 	char mess[MAX_STR_LENGTH] = "";
 
-	if(thisDetector->myDetectorType == GOTTHARD ||
-			thisDetector->myDetectorType == PROPIX)
-		cleanupAcquisition(); // reset (send data to receiver) for these detectors,
-	//so back to CPU (dont care about ok/fail at this point)
-
 	if (thisDetector->receiverOnlineFlag==ONLINE_FLAG) {
 #ifdef VERBOSE
 		std::cout << "Stopping Receiver " << std::endl;
diff --git a/slsDetectorSoftware/slsDetector/slsDetectorCommand.cpp b/slsDetectorSoftware/slsDetector/slsDetectorCommand.cpp
index 9752e946e..398c937f9 100644
--- a/slsDetectorSoftware/slsDetector/slsDetectorCommand.cpp
+++ b/slsDetectorSoftware/slsDetector/slsDetectorCommand.cpp
@@ -4464,6 +4464,9 @@ string slsDetectorCommand::cmdDetectorSize(int narg, char *args[], int action) {
 
 	myDet->setOnline(ONLINE_FLAG);
 
+	if (cmd == "roi")
+		myDet->setReceiverOnline(ONLINE_FLAG);
+
 	if (action==PUT_ACTION) {
 		if (cmd=="maxmod")
 			return string("cannot put!");
@@ -4481,10 +4484,10 @@ string slsDetectorCommand::cmdDetectorSize(int narg, char *args[], int action) {
 			ROI allroi[val];
 			pos=2;
 			for(i=0;i<val;++i){
-				if ((!sscanf(args[++pos],"%d",&allroi[i].xmin)) ||
-						(!sscanf(args[++pos],"%d",&allroi[i].xmax)) ||
-						(!sscanf(args[++pos],"%d",&allroi[i].ymin)) ||
-						(!sscanf(args[++pos],"%d",&allroi[i].ymax)) )
+				if ((!sscanf(args[pos++],"%d",&allroi[i].xmin)) ||
+						(!sscanf(args[pos++],"%d",&allroi[i].xmax)) ||
+						(!sscanf(args[pos++],"%d",&allroi[i].ymin)) ||
+						(!sscanf(args[pos++],"%d",&allroi[i].ymax)) )
 					return string("cannot parse arguments for roi");
 			}
 			myDet->setROI(val,allroi);