ID:13562 SystemVerilog Enumeration Type Declaration error at <location>: can't assign encoded value with x or z to enumeration element "<name>" with a 2-state data type

CAUSE: In a enumeration data type declaration at the specified location in a Verilog Design File(.v), you assigned an encoded value with one or more 'x' or 'z' bits to the specified enumeration element. However, you declared the enumeration with a 2-state data type, which only supports the values 1 or 0.

ACTION: Declare the enumeration with a 4-state data type, or remove the 'x' or 'z' bits from the encoded value.