When using the MIG 7 Series tool and clicking "Cancel" to close without generating a core, CORE Generator appears to generate a core and open the readme file. Why is CORE Generator generating a core upon canceling the GUI?
Solution
This is a bug in ISE 14.1 software which can be safely ignored. The 7 Series MIG core is not generated. This issue will be resolved in ISE 14.2 software.