diff --git a/400-SOURCECODE/AIAHTML5.Web/extract-wp.js b/400-SOURCECODE/AIAHTML5.Web/extract-wp.js
index a88b3a3..6ad8eb1 100644
--- a/400-SOURCECODE/AIAHTML5.Web/extract-wp.js
+++ b/400-SOURCECODE/AIAHTML5.Web/extract-wp.js
@@ -18,89 +18,91 @@ getLocationForMatchedTermsInWholeBody = function (termList, maskCanvasData, colo
             grayImageData = previousGrayImageDataList[parseInt(bodyRegionId - 1)];
 
         }
-        var grayImageDataVar = grayImageData.data;
-        var coloredImageDataVar = coloredImageData.data;
+        if (grayImageData != null) {
+            var grayImageDataVar = grayImageData.data;
+            var coloredImageDataVar = coloredImageData.data;
 
-        for (var i = 0; i < n; i += 4) {
+            for (var i = 0; i < n; i += 4) {
 
 
-            var RED = maskData[i] - 9;
-            var GREEN = maskData[i + 1] - 9;
-            var BLUE = maskData[i + 2] - 9;
+                var RED = maskData[i] - 9;
+                var GREEN = maskData[i + 1] - 9;
+                var BLUE = maskData[i + 2] - 9;
 
-            var Red;
-            var Green;
-            var Blue;
-            var zero = "0";
+                var Red;
+                var Green;
+                var Blue;
+                var zero = "0";
 
-            if ((RED).toString().length != 2) {
-                Red = zero.concat((RED).toString())
-            }
-            else {
-                Red = (RED).toString()
-            }
-            if ((GREEN).toString().length != 2) {
-                Green = zero.concat((GREEN).toString())
-            }
-            else {
-                Green = (GREEN).toString()
+                if ((RED).toString().length != 2) {
+                    Red = zero.concat((RED).toString())
+                }
+                else {
+                    Red = (RED).toString()
+                }
+                if ((GREEN).toString().length != 2) {
+                    Green = zero.concat((GREEN).toString())
+                }
+                else {
+                    Green = (GREEN).toString()
 
-            }
-            if ((BLUE).toString().length != 2) {
-                Blue = zero.concat((BLUE).toString())
-            }
-            else {
-                Blue = (BLUE).toString()
+                }
+                if ((BLUE).toString().length != 2) {
+                    Blue = zero.concat((BLUE).toString())
+                }
+                else {
+                    Blue = (BLUE).toString()
 
-            }
+                }
 
-            var Icolor = (Red + Green + Blue);
-            // alert('Icolor: ' + Icolor)
+                var Icolor = (Red + Green + Blue);
+                // alert('Icolor: ' + Icolor)
 
-            if (parseInt(termList[z]._TermNumber) == parseInt(Icolor)) {
+                if (parseInt(termList[z]._TermNumber) == parseInt(Icolor)) {
 
-                //  debugger;
+                    //  debugger;
 
 
-                //   matchedRGBLocationInBodyRegion.push({ "BRId": bodyRegionId, "location": i });
+                    //   matchedRGBLocationInBodyRegion.push({ "BRId": bodyRegionId, "location": i });
 
 
-                //   matched = true;
+                    //   matched = true;
 
-                var RED_coloredImage = coloredImageDataVar[i];
+                    var RED_coloredImage = coloredImageDataVar[i];
 
-                grayImageDataVar[i] = RED_coloredImage;
+                    grayImageDataVar[i] = RED_coloredImage;
 
 
-                var GREEN_coloredImage = coloredImageDataVar[i + 1];
-                grayImageDataVar[i + 1] = GREEN_coloredImage;
+                    var GREEN_coloredImage = coloredImageDataVar[i + 1];
+                    grayImageDataVar[i + 1] = GREEN_coloredImage;
 
-                var BLUE_coloredImage = coloredImageDataVar[i + 2];
-                grayImageDataVar[i + 2] = BLUE_coloredImage;
+                    var BLUE_coloredImage = coloredImageDataVar[i + 2];
+                    grayImageDataVar[i + 2] = BLUE_coloredImage;
 
 
-                var ALPHA_coloredImage = coloredImageDataVar[i + 3];
-                grayImageDataVar[i + 3] = ALPHA_coloredImage;
+                    var ALPHA_coloredImage = coloredImageDataVar[i + 3];
+                    grayImageDataVar[i + 3] = ALPHA_coloredImage;
 
-            }
+                }
 
 
-        }
-        //  debugger;
-        previousGrayImageDataList[parseInt(bodyRegionId - 1)] = grayImageData;
+            }
+            //  debugger;
+            previousGrayImageDataList[parseInt(bodyRegionId - 1)] = grayImageData;
 
-        //  if (matched == true) {
+            //  if (matched == true) {
 
-        // }
+            // }
 
-    }
-    self.postMessage({
-        'bodyRegionId': bodyRegionId,
-        'value': grayImageData,
-        'canvasId': canvasId
 
-    });
+            self.postMessage({
+                'bodyRegionId': bodyRegionId,
+                'value': grayImageData,
+                'canvasId': canvasId
 
+            });
+        }
+    }
 }
 
 self.onmessage = function (e) {