diff --git a/PROMS/Volian.Controls.Library/DisplayRO.cs b/PROMS/Volian.Controls.Library/DisplayRO.cs
index 2a13505c..e29e4927 100644
--- a/PROMS/Volian.Controls.Library/DisplayRO.cs
+++ b/PROMS/Volian.Controls.Library/DisplayRO.cs
@@ -702,6 +702,11 @@ namespace Volian.Controls.Library
 				if (str[cnt] == '.')
 				{
 					cnt = NextNonNumber(str, cnt + 1);
+					if (cnt >= str.Length) //jsj bug fix
+					{
+						outstr += str.Substring(tstr);
+						break; // jump out of while loop - nothing else to process
+					}
 					if (str[start] == '\'')
 					{
 						start++;