ID:10525 VHDL warning at <location>: Exemplar attribute or directive <name> is not supported in Quartus Prime software version 2.1 and earlier -- only translate_off and translate_on are supported

CAUSE: In a VHDL Design File (.vhd) at the specified location, you used the specified Exemplar attribute or directive. However, the Quartus Prime software version 2.1 or earlier supports only the translate_off and translate_on synthesis directives.

ACTION: To avoid problems in the future processing of the design, or to avoid receiving this message in the future, remove the unsupported attribute or directive.