I modified convert_bin_from_pgn-extract based on requests from linox and yorkman in discord.

learn convert_bin_from_pgn-extract pgn_eval_side_to_move 1 convert_no_eval_fens_as_score_zero 1 output_file_name out.bin in.txt

The modified convert_bin_from_pgn-extract now supports the following forms of eval

• { [%eval 0.25] [%clk 0:10:00] }
• { +0.71/22 1.2s }
• { 0.60 }
• { book }
• no eval
• others

I added the option "convert_no_eval_fens_as_score_zero".
In the case of the above { book }, no eval, others

• convert_no_eval_fens_as_score_zero 0 : Skip the conversion of the fen.
• convert_no_eval_fens_as_score_zero 1 : Convert the fen as score 0.

"convert_no_eval_fens_as_score_zero 1" allows you to convert pgn including no eval.

When the presence or absence of eval is mixed in in.txt, stockfish.exe would sometimes crash in previous versions.
The modified version does not crash, but continues processing according to the value of convert_no_eval_fens_as_score_zero.

linox helped with the testing.