┌──────────────────────────────┐
 │ Invalid symbol reference     │
 └──────────────────────────────┘

 ■ You are attempting to access a standard
   procedure, a standard function, or the
   Mem, MemW, MemL, Port, or PortW special
   arrays in an assembler operand.

 ■ You are attempting to access a string,
   floating-point, or set constant in an
   assembler operand.

 ■ You are attempting to access an inline
   procedure or function in an assembler
   operand.

 ■ You are attempting to access the @Result
   special symbol outside a function.

   instruction that jumps to something other
   than a label.