Semantic Error (SEM1269): The parameter '...' has changed in the definition of the function.
In a graphical code worksheet, an outdated function call has been detected: The formal parameter mentioned in the error message has been renamed in the function prototype.
Error example
The second input of the function MyFunction has been renamed (variable grid on the right) although the function is already called in an FBD worksheet (function call on the left).
Remedy
Double-clicking the error message opens the code and marks the incorrect code position. Either update the function call (using the 'Update...' context menu command) or adapt the function prototype accordingly.