E2066 Missing operator or semicolon error for NO reason

I have the following line of code.   If it is in my app, it will fail with the message: E2066 Missing operator or semicolon.  If the line is NOT there, it will compile fine.

Artist is a valid public string to the unit.  

if Length(artist) = 0 then artist := 'Unknown';

Why the heck is this happening?
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Without seeing a bigger excerpt of the code, it is difficult to advise.  On the face of it, there is no reason for it to fail.  Things to look at:

Is artist or length being used in a different context to normal?  e.g. using artist as the unit name; using length as a variable, using either of these in a Const declaration.  Look for Includes in your code.

What happens if you override the artist declaration by defining it within the function/procedure where this error is occurring?  (I know this will prevent the program from working correctly, but may give a clue where the problem is).
Mohammed NasmanSoftware DeveloperCommented:
are you sure there's a semicolon before the line you wrote above?

if you show few lines from your code, it will be easier to analyze your problem
I agree, more than likely the problem is with the line above, what's the chances you have a nested if statement / case statment just above?
if Length(artist) = 0 then artist := 'Unknown';


a : length(artist); //assign as integer (a)
if a = 0 then artist := 'unknown';

But ye it should work without doing this...

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