Invalid predefined symbol

Predefined symbols are usually prefixed by a # character. This errors indicates that you either mistyped the predefined symbol, or accidentally inserted the # character in your code. Examples:

x = #pixe   ; typo
y = 3 + #5  ; accidental # here

Here are corrected forms of these examples:

x = #pixel
y = 3 + 5

See Also
Errors