Kickstart has a capability of taking in the arguments for invocation from an input file instead of the command line.
This is to get around a Condor limit that limits how big the arguments section can be in a submit file.

When Pegasus detects that the argument string is bigger than 4K, it writes the arguments into a file and the file is transferred using Condor File IO.
However, for clustered jobs it appears the .arg files are created but not transferred over using Condor File IO.