Error building index

[pdtrang]

Hi,

I try to run hera_build but it keeps giving me the following error.

`./hera_build --fasta /home/user/test_data/Homo_sapiens.GRCh37.87.fa --gtf /home/user/test_data/Homo_sapiens.GRCh37.87.gtf --outdir /home/user/test_data --full_index 0 --grch38 0

Scan reference sequence ...
Scan gtf file...
Extract transcript sequence
Traceback (most recent call last):
File "/usr/bin/hera_build", line 230, in
subprocess.call([path , "index", "-t", os.path.join(args.outdir, "transcripts.fasta"), "-o", os.path.join(args.outdir, "index"), "-g", args.fasta])
File "/usr/lib/python2.7/subprocess.py", line 523, in call
return Popen(*popenargs, **kwargs).wait()
File "/usr/lib/python2.7/subprocess.py", line 711, in init
errread, errwrite)
File "/usr/lib/python2.7/subprocess.py", line 1343, in _execute_child
raise child_exception
OSError: [Errno 2] No such file or directory
`
I'm not sure which file hera looked for. Please let me know how to fix it.

Thanks!