diff --git a/com.actionsoft.apps.coe.pal/web/com.actionsoft.apps.coe.pal/lib/designer/scripts/diagraming/versionCompare/version.core.debug.js b/com.actionsoft.apps.coe.pal/web/com.actionsoft.apps.coe.pal/lib/designer/scripts/diagraming/versionCompare/version.core.debug.js
index 8889470b..e0225878 100644
--- a/com.actionsoft.apps.coe.pal/web/com.actionsoft.apps.coe.pal/lib/designer/scripts/diagraming/versionCompare/version.core.debug.js
+++ b/com.actionsoft.apps.coe.pal/web/com.actionsoft.apps.coe.pal/lib/designer/scripts/diagraming/versionCompare/version.core.debug.js
@@ -1129,7 +1129,11 @@ const VersionDesigner = {
 			let Model = PageModel[pos]
 			if (h.linkerType == "curve" || h.linkerType == "broken") {
 				if (!h.points || h.points.length == 0) {
-					h.points = Utils.getLinkerPoints(h)
+					try{
+						h.points = Utils.getLinkerPoints(h)
+					}catch(e){
+						console.log(e)
+					}
 				}
 			}
 			var q = h.points;
@@ -2517,19 +2521,23 @@ const Utils = {
 		return this.getAngle(n, i)
 	},
 	getAngle: function (f, e) {
-		var d = isNaN(Math.atan(Math.abs(f.y - e.y) / Math.abs(f.x - e.x))) ? 0 : Math.atan(Math.abs(f.y - e.y) / Math.abs(f.x - e.x));
-		if (e.x <= f.x && e.y > f.y) {
-			d = Math.PI - d
-		} else {
-			if (e.x < f.x && e.y <= f.y) {
-				d = Math.PI + d
+		try { 
+			var d = isNaN(Math.atan(Math.abs(f.y - e.y) / Math.abs(f.x - e.x))) ? 0 : Math.atan(Math.abs(f.y - e.y) / Math.abs(f.x - e.x));
+			if (e.x <= f.x && e.y > f.y) {
+				d = Math.PI - d
 			} else {
-				if (e.x >= f.x && e.y < f.y) {
-					d = Math.PI * 2 - d
+				if (e.x < f.x && e.y <= f.y) {
+					d = Math.PI + d
+				} else {
+					if (e.x >= f.x && e.y < f.y) {
+						d = Math.PI * 2 - d
+					}
 				}
 			}
+			return d	
+		}catch (e) {
+			return 0
 		}
-		return d
 	},
 	getLinkerLineStyle: function (pos, a, b) {
 		let Model = PageModel[pos]