Index: /branches/eam_branches/ohana.20170822/src/libohana/src/isolate_elements.c
===================================================================
--- /branches/eam_branches/ohana.20170822/src/libohana/src/isolate_elements.c	(revision 40233)
+++ /branches/eam_branches/ohana.20170822/src/libohana/src/isolate_elements.c	(revision 40234)
@@ -171,5 +171,8 @@
   // order matches convert_to_RPN.c
   if (!strncmp (c, "?",  1)) return (TRUE);
-  if (!strncmp (c, ":",  1)) return (TRUE);
+
+  // if (!strncmp (c, ":",  1)) return (TRUE);
+
+  // do not include : in this list: an unisolated colon acts as a modifier
 
   if (!strncmp (c, "^",  1)) return (TRUE);