Field Bug problem found: Explanation Requested...Ok Gurus, a Challenge!

(This cross post could effect both laguages, so I posted it in Lisp and VBA,
please excuse...)

I was having a bug in my code (VB or Lisp), and finally found the anomaly!!

Field expression #1:

%<\AcObjProp Object(2130272168).TextString \f %bl2>%

compared to Field expression #2

%<\AcObjProp Object(%<\_ObjId 2130272168>%).TextString \f %bl2>%


Notice the text added (shown in brackets to distiguish AutoCAD added text to
the expression) in by AutoCAD somewhere, sometimes? I do not know why?

%<\AcObjProp Object([%<\_ObjId ]2130272168[>%]).TextString \f %bl2>%


Any ideas?
I have created a fix for my code to simply rewrite the field expression by
removing the extra text AutoCAD adds to the code if it exists, but I do not
like doing this without knowing why?

The extra code is not required as far as I can tell from my testing.

Thanks,
Dan

 

Thanks, I believe I understand now...