**Error: unable to open file or unable to determine types for file**

Question

[Neel]

Error: unable to open file or unable to determine types for file

Hi i am trying to run this commands bedtools intersect -a Ec_k12.gff -b target_genes.txt -f 0.5 -wa -wb > genes_with_coordinates.bed and i am getting this error even after following given steps regarding this error on biostars/google. please help me if anyone know how to solve it? and the error is -

Error: unable to open file or unable to determine types for file / target_genes.tx

- Please ensure that your file is TAB delimited (e.g., cat -t FILE).
- Also ensure that your file has integer chromosome coordinates in the
  expected columns (e.g., cols 2 and 3 for BED).

thank you !

[Pierre Lindenbaum]

Please ensure that your file is TAB delimited (e.g., cat -t FILE).
- Also ensure that your file has integer chromosome coordinates in the
expected columns (e.g., cols 2 and 3 for BED).

and ? ....