Description
This warning message refers to an internal fitter feature for some device families. The message may appear, for example, when compiling a design for the ACEK® 1K EP1K50FI252-2 device. It does not apply to the ACEX 1K device family. Therefore, you can safely ignore the warning message.
This problem has been fixed beginning with the Quartus® II software version 5.1 service pack 1.