The split_string_into_string_list_by_regular_expresson outputs an empty list since the string to be split is defaulted to ''. As there are no input values, the create_and_populate_temporary_file generates an empty list. The create_temporary_file beanshell creates a file to which the concatentation can be written. The concatenate_files service does not write anything to the temporary output file. Because the displayresults port has been given a default value of 'true', the empty string is ...