Handle lack of resave file

CobXmlSupport/GenCobCode.cs

@@ -1281,8 +1281,16 @@ namespace CobXmlSupport
 
         private long fileSize(string fileStr)
         {
-            FileInfo fi = new FileInfo(fileStr);
+            FileInfo fi;
-            return fi.Length;
+            try
+            {
+                fi = new FileInfo(fileStr);
+                return fi.Length;
+            }
+            catch (Exception)
+            {
+                return 0;
+            }
         }