Script finishes with warning message

[squarefrog]

When I try and run the package I get the following error:

$ node bricklink-helper.js --in /Users/pi/Downloads/lddcreation\ \(2\).lxf --out orders.csv --cache cache.json
Reading parts availability from cache...
*** WARNING *** Suitable sellers could not be found for part ids: 4222627.
Handing control over to R; this can take a long time...
Completed.
Rsymphony
     TRUE

Loading required package: Rsymphony
Warning message:
In read.table(file = file, header = header, sep = sep, quote = quote,  :
  incomplete final line found by readTableHeader on '/Users/pi/git/bricklink-helper/.r-exchange/parameters.csv'

Finished.

Edit: I should say it finishes with a warning. It seems the software returns successfully, as an orders.csv file is generated.