Variable has not been declared

This variable is read from, but it hasn't been declared yet. Example:

z = x

where x is the undeclared variable. Variables are declared when they are first written to. In this case, x is auto-declared and given the value (0,0), and its type is complex. However, this warning indicates a logical error in the formula.

This would be a possible solution for the example given above:

float x
...
z = x

See Also
Warnings