Hi,
You've created a document for this question.
I recommend you to create a thread in future.
The Document should be reserved to provide some information as example or defining a behavior.
The #error directive is defined in the main.c file at line 12.
You need to check this file.
Most of the time this is linked to a definition check.
In all case you will see more info in the Console view (second TAB).
Pascal