Issue while generating scorer for Urdu language

After running this:
python data/lm/generate_lm.py --input_txt data/alphabet.txt --output_dir output_models --top_k 500000 --kenlm_bins kenlm-master/build/bin/ --arpa_order 5 --max_arpa_memory “85%” --arpa_prune “0|0|1” --binary_a_bits 255 --binary_q_bits 8 --binary_type tries --discount_fallback

i found error at the end as:

Building lm.binary …
Usage: kenlm-master/build/bin/build_binary [-u log10_unknown_probability] [-s] [-i] [-v] [-w mmap|after] [-p probing_multiplier] [-T trie_temporary] [-S trie_building_mem] [-q bits] [-b bits] [-a bits] [type] input.arpa [output.mmap]