An error occurred while executing cat: Error! No non-empty files found at /home/vlamba/CotDis_chaining/temp_concat_lastz_output. The failed operation label is: cat_step

[vinitamehlawat]

Hi authors,

I ran the ./make_chains.py Cot Dis /home/vlamba/target.fa /storage/vlamba/data/Genomes-noto/NOTO-genome/query.fa --project_dir /home/vlamba/CotDis_chaining -f --chaining_memory 30 and got the following error:

`### Nextflow process lastz finished successfully
Found 8 output files from the LASTZ step
Please note that lastz_step.py does not produce output in case LASTZ could not find any alignment

Concatenating Lastz Results (Cat) Step

Concatenating LASTZ output from 8 buckets

• skip bucket bucket_ref_bulk_4: nothing to concat
• skip bucket bucket_ref_bulk_2: nothing to concat
• skip bucket bucket_ref_bulk_7: nothing to concat
• skip bucket bucket_ref_bulk_5: nothing to concat
• skip bucket bucket_ref_bulk_8: nothing to concat
• skip bucket bucket_ref_bulk_1: nothing to concat
• skip bucket bucket_ref_bulk_3: nothing to concat
• skip bucket bucket_ref_bulk_6: nothing to concat
  An error occurred while executing cat: Error! No non-empty files found at /home/vlamba/CotDis_chaining/temp_concat_lastz_output. The failed operation label is: cat_step`

Could you please suggest If I did something wrong?

Thank you