issue running CCAT

Hi there,
I’ve been trying too run CCAT on the galaxy project website for peak calling on Arabidopsis ChIP-seq but I get the following error message:

Error running CCAT.
Traceback (most recent call last):
File “/opt/galaxy/shed_tools/”, line 41, in
if name == “main”: main()
File “/opt/galaxy/shed_tools/”, line 38, in main
return stop_err( tmp_dir, e )
File “/opt/galaxy/shed_tools/”, line 13, in stop_err
raise exception
AssertionError: The required chromosome length file does not exist.

Any idea ?