sourceFileLocation  
  Specifies which file to use as input to the workflow step: either the output from the previous step, or the originally uploaded file for the workflow.
- To use the previous file as the input, enter - ${previous.file}. In this case, this workflow step uses the output file from the previous workflow step as input. This is the default value.
- To use the originally uploaded file location as input for this step, enter - ${original.file}.