diff --git a/RELEASE.txt b/RELEASE.txt
index d6518d2c4..89b4f174d 100644
--- a/RELEASE.txt
+++ b/RELEASE.txt
@@ -19,6 +19,7 @@ This document describes the differences between 4.0.2 and 4.0.1 releases.
 
     - Jungfrau receiver as root user
     - Jungfrau server detector position error when switching between different detector sizes
+    - Client API data call back / Gui (Eiger in 4 bit mode)
 
 
 
@@ -35,10 +36,21 @@ This document describes the differences between 4.0.2 and 4.0.1 releases.
         This has been fixed now to allow a greater size (including the default size).
 
 
-   Detector Server (Jungfrau)
-   --------------------------
-   1.   Switching between different detector size configurations, the detector gave an
-	error "Could not set detector position". This is fixed now.
+    Detector Server (Jungfrau)
+    --------------------------
+    1.  Switching between different detector size configurations, the detector gave an
+	    error "Could not set detector position". This is fixed now.
+
+    
+    Client API / Gui (Eiger)
+    ------------------------
+    1.  Client data call back provided the complete image data, but the number of pixels 
+        in x and y was provided incorrectly at a modular level. This has been fixed to give 
+        the proper value. This also fixes the Gui crashing for Eiger 4 bit mode when 
+        acquiring for multiple images.
+
+
+
 
         
 3. Known Issues
diff --git a/slsDetectorSoftware/multiSlsDetector/multiSlsDetector.cpp b/slsDetectorSoftware/multiSlsDetector/multiSlsDetector.cpp
index 172eb8c4e..24b0010e2 100644
--- a/slsDetectorSoftware/multiSlsDetector/multiSlsDetector.cpp
+++ b/slsDetectorSoftware/multiSlsDetector/multiSlsDetector.cpp
@@ -5147,19 +5147,20 @@ void multiSlsDetector::readFrameFromReceiver() {
 
 		//send data to callback
 		if (data) {
+			int nCompletePixelsX = thisMultiDetector->numberOfChannelInclGapPixels[X];
+			int nCompletePixelsY = thisMultiDetector->numberOfChannelInclGapPixels[Y];
+		
 			// 4bit gap pixels
 			if (dynamicRange == 4 && gappixelsenable) {
 				int n    = processImageWithGapPixels(multiframe, multigappixels);
-				nPixelsX = thisMultiDetector->numberOfChannelInclGapPixels[X];
-				nPixelsY = thisMultiDetector->numberOfChannelInclGapPixels[Y];
 				thisData = new detectorData(NULL, NULL, NULL, getCurrentProgress(),
-						currentFileName.c_str(), nPixelsX, nPixelsY,
+						currentFileName.c_str(), nCompletePixelsX, nCompletePixelsY,
 						multigappixels, n, dynamicRange, currentFileIndex);
 			}
 			// normal pixels
 			else {
 				thisData = new detectorData(NULL, NULL, NULL, getCurrentProgress(),
-						currentFileName.c_str(), nPixelsX, nPixelsY,
+						currentFileName.c_str(), nCompletePixelsX, nCompletePixelsY,
 						multiframe, multisize, dynamicRange, currentFileIndex);
 			}
 			dataReady(thisData, currentFrameIndex,
diff --git a/slsDetectorSoftware/slsDetector/slsDetectorCommand.cpp b/slsDetectorSoftware/slsDetector/slsDetectorCommand.cpp
index 651d30210..a0850d14d 100644
--- a/slsDetectorSoftware/slsDetector/slsDetectorCommand.cpp
+++ b/slsDetectorSoftware/slsDetector/slsDetectorCommand.cpp
@@ -4041,7 +4041,7 @@ string slsDetectorCommand::cmdNetworkParameter(int narg, char *args[], int actio
         t=RECEIVER_UDP_SCKT_BUF_SIZE;
         if (action==PUT_ACTION){
         	uint64_t ival = -1;
-            if (!(sscanf(args[1],"%ld",&i)))
+            if (!(sscanf(args[1],"%ld",&ival)))
                 return ("cannot parse argument") + string(args[1]);
         }
     } else if (cmd=="rx_realudpsocksize") {