Subject: Import TSV - too many args/columns

I'm trying to use the ImportTSV utility to generate HFiles and move them into an instance using the CompleteBulkLoad tool.

Right now an error I'm running into is that the arg list is too long -  I have over 50,000 columns to specify in my CS, and the bash shell throws an error. Is there an easy way around this? Piping the arguments does not seem to work either.