ID:13973 VHDL syntax error at <location>: experienced unexpected end-of-file while processing comment block. The comment block must have the ending comment delimiter (asterisk and slash).

CAUSE: In a block comment in a VHDL Design File at the specified location, you used a beginning comment delimiter (slash and asterisk, or /*) without a corresponding ending comment delimiter (asterisk and slash, or */). As a result, the Quartus Prime integrated synthesis has unexpectedly reached the end-of-file marker and has consequently disabled further processing of the file.

ACTION: Add a */ at the end of the comment block that begins with the unmatched /*.