diff --git a/slsDetectorSoftware/commonFiles/versionAPI.h b/slsDetectorSoftware/commonFiles/versionAPI.h
index c3a58ea4b..064ef5977 100644
--- a/slsDetectorSoftware/commonFiles/versionAPI.h
+++ b/slsDetectorSoftware/commonFiles/versionAPI.h
@@ -1,5 +1,5 @@
 /** API versions */
 #define APIRECEIVER 0x180823
-#define APIEIGER 0x180820
+#define APIEIGER 0x181130
 #define APIJUNGFRAU 0x180823
 #define APIGOTTHARD 0x181203
diff --git a/slsDetectorSoftware/eigerDetectorServer/FebControl.c b/slsDetectorSoftware/eigerDetectorServer/FebControl.c
index aa63dbab7..9b8990955 100644
--- a/slsDetectorSoftware/eigerDetectorServer/FebControl.c
+++ b/slsDetectorSoftware/eigerDetectorServer/FebControl.c
@@ -2014,14 +2014,24 @@ uint32_t Feb_Control_WriteRegister(uint32_t offset, uint32_t data) {
 	uint32_t value=0;
 	if(Module_TopAddressIsValid(&modules[1])){
 		if(!Feb_Interface_WriteRegister(Module_GetTopRightAddress (&modules[1]),offset, data,0, 0)) {
-			cprintf(RED,"Could not read value. Value read:%d\n", value);
+			cprintf(RED,"Could not read tr value. Value read:%d\n", value);
 			value = 0;
 		}
+		if(!Feb_Interface_WriteRegister(Module_GetTopLeftAddress (&modules[1]),offset, data,0, 0)) {
+		    cprintf(RED,"Could not read tl value. Value read:%d\n", value);
+		    value = 0;
+		}
+
 	} else {
 		if(!Feb_Interface_WriteRegister(Module_GetBottomRightAddress (&modules[1]),offset, data,0, 0)) {
-			cprintf(RED,"Could not read value. Value read:%d\n", value);
+			cprintf(RED,"Could not read br value. Value read:%d\n", value);
 			value = 0;
 		}
+		if(!Feb_Interface_WriteRegister(Module_GetBottomLeftAddress (&modules[1]),offset, data,0, 0)) {
+		    cprintf(RED,"Could not read bl value. Value read:%d\n", value);
+		    value = 0;
+		}
+
 	}
 	return Feb_Control_ReadRegister(offset);
 }
@@ -2029,16 +2039,34 @@ uint32_t Feb_Control_WriteRegister(uint32_t offset, uint32_t data) {
 
 uint32_t Feb_Control_ReadRegister(uint32_t offset) {
 	uint32_t value=0;
+	uint32_t value1=0;
 	if(Module_TopAddressIsValid(&modules[1])){
-		if(!Feb_Interface_ReadRegister(Module_GetTopRightAddress (&modules[1]),offset, &value)) {
-			cprintf(RED,"Could not read value. Value read:%d\n", value);
-			value = 0;
-		}
+	    if(!Feb_Interface_ReadRegister(Module_GetTopRightAddress (&modules[1]),offset, &value)) {
+	        cprintf(RED,"Could not read value. Value read:%d\n", value);
+	        value = 0;
+	    }
+	    printf("Read top right addr: 0x%08x\n", value);
+	    if(!Feb_Interface_ReadRegister(Module_GetTopLeftAddress (&modules[1]),offset, &value1)) {
+	        cprintf(RED,"Could not read value. Value read:%d\n", value1);
+	        value1 = 0;
+	    }
+	    printf("Read top left addr: 0x%08x\n", value1);
+	    if (value != value1)
+	        value = -1;
+
 	} else {
-		if(!Feb_Interface_ReadRegister(Module_GetBottomRightAddress (&modules[1]),offset, &value)) {
-			cprintf(RED,"Could not read value. Value read:%d\n", value);
-			value = 0;
-		}
+	    if(!Feb_Interface_ReadRegister(Module_GetBottomRightAddress (&modules[1]),offset, &value)) {
+	        cprintf(RED,"Could not read value. Value read:%d\n", value);
+	        value = 0;
+	    }
+	    printf("Read bottom right addr: 0x%08x\n", value);
+	    if(!Feb_Interface_ReadRegister(Module_GetBottomLeftAddress (&modules[1]),offset, &value1)) {
+	        cprintf(RED,"Could not read value. Value read:%d\n", value1);
+	        value1 = 0;
+	    }
+	    printf("Read bottom left addr: 0x%08x\n", value1);
+	    if (value != value1)
+	        value = -1;
 	}
 	return value;
 }
diff --git a/slsDetectorSoftware/eigerDetectorServer/gitInfo.txt b/slsDetectorSoftware/eigerDetectorServer/gitInfo.txt
index 2203f76da..d20ebe849 100644
--- a/slsDetectorSoftware/eigerDetectorServer/gitInfo.txt
+++ b/slsDetectorSoftware/eigerDetectorServer/gitInfo.txt
@@ -1,9 +1,9 @@
 Path: slsDetectorsPackage/slsDetectorSoftware/eigerDetectorServer 
 URL: origin git@github.com:slsdetectorgroup/slsDetectorPackage.git 
 Repository Root: origin git@github.com:slsdetectorgroup/slsDetectorPackage.git 
-Repsitory UUID: 63c130a3806b47332b1532ab00f9f344c5839e0e 
-Revision: 348 
-Branch: 4.0.0-rc 
+Repsitory UUID: 2c08c1e7ce814934b4c943df2cc715c6bd406a83 
+Revision: 349 
+Branch: 4.0.1-rc 
 Last Changed Author: Dhanya_Thattil 
-Last Changed Rev: 3986 
-Last Changed Date: 2018-08-20 11:38:13.000000002 +0200 ./Makefile.virtual
+Last Changed Rev: 4031 
+Last Changed Date: 2018-11-30 16:01:05.000000002 +0100 ./Makefile.virtual
diff --git a/slsDetectorSoftware/eigerDetectorServer/gitInfoEiger.h b/slsDetectorSoftware/eigerDetectorServer/gitInfoEiger.h
index 7a917f824..de02b21e2 100644
--- a/slsDetectorSoftware/eigerDetectorServer/gitInfoEiger.h
+++ b/slsDetectorSoftware/eigerDetectorServer/gitInfoEiger.h
@@ -1,6 +1,6 @@
 #define GITURL "git@github.com:slsdetectorgroup/slsDetectorPackage.git"
-#define GITREPUUID "63c130a3806b47332b1532ab00f9f344c5839e0e"
+#define GITREPUUID "2c08c1e7ce814934b4c943df2cc715c6bd406a83"
 #define GITAUTH "Dhanya_Thattil"
-#define GITREV 0x3986
-#define GITDATE 0x20180820
-#define GITBRANCH "4.0.0-rc"
+#define GITREV 0x4031
+#define GITDATE 0x20181130
+#define GITBRANCH "4.0.1-rc"