It is not trivial to distinguish unrecognized symbols from not symbols. Anyway, it shouldn't appear in normal circumstances. So it means there are unrecognized symbols in you code. Do you use complex macros or macros in "odd" places? If you take a screenshot or paste an example we may recognize the cause of this or can ask other questions to find out the roots of this problem.
This message can happen in any part of the many different projects that I work in, so there is no point in posting any specific code. I know that if I get this message, it will probably go away later when VA sorts itself out, or finishes parsing or whatever it is doing.
My problem is not with the fact that the error occurs, it is that this error message specifically blames the error on the user.
If VA instead said something like "'xyz' is not recognized because this code hasn't been parsed yet." then that would be much better on my nerves.