ID:274010 Function <number> in LUT is illegal

CAUSE: The EDA design entry or synthesis tool you are using generated the specified illegal function in the LUT in an EDIF Input File (.edf).

ACTION: Specify a legal function in the source design file. In general, it is better to correct only the source design file rather than the EDIF Input File. If you prefer to edit the EDIF Input file, make sure it conforms to the format for EDIF version 2 0 0. If necessary, refer to your EDIF manual.