diff --git a/PROMS/XYPlots/XYPlots.cs b/PROMS/XYPlots/XYPlots.cs
index acfdf997..d0eaa540 100644
--- a/PROMS/XYPlots/XYPlots.cs
+++ b/PROMS/XYPlots/XYPlots.cs
@@ -1202,7 +1202,7 @@ namespace XYPlots
 			{
 				double tprime;
 				tprime = FixAngle(thetaa);
-				if (Math.Abs(tprime - t3) < ANGLELIMIT)
+				if (Math.Abs(tprime - t3) <= ANGLELIMIT)
 				{
 					MoveTo(pt1.APoint);
 					DrawTo(pt2.APoint, pg, vgOutput);
@@ -1374,7 +1374,7 @@ namespace XYPlots
 					//DebugOutput("DrawArc5"); VG_Arc.iColor = 5;
 					//VG_Arc.iColor = 6;
 //#endif
-					DrawArc(r2, t2, t2 - theta2, cp2, x, y, pg, vgOutput);
+					if (r2 != 0) DrawArc(r2, t2, t2 - theta2, cp2, x, y, pg, vgOutput);
 					DebugShowLocation("DrawArc5");
 				}
 				//DebugOutput(""); VG_Arc.iColor = 6;