>>I don't see a problem with the object here. For me this looks like a safe code.
>
>

>yourunknown = CREATEOBJECT([EMPTY])
>? VARTYPE(m.yourunknown)
>

>
>Just because objects are memory variables also.

Right, it would be O, I think. So, what is the problem with the code above? vartype(m.unknown) = 'O', so it's not a field.

vartype(unknown) <> "U" and vartype(m.unknown) = 'U'
  This is a field - no exceptions except for the case of select m as an alias