If preprocessing or postprocessing runs in a Unix or Windows system then the following applies:
During preprocessing the data is by default output to stdout. You can, however, also output the data created by preprocessing in a temporary file created by openFT. You can detect the name of this file via the variable %TEMPFILE and give it over to the preprocessing as a calling parameter. The temporary file is then transferred to the partner system.
During postprocessing, the data is read from stdin by default. In this case, it must possess a format which can be processed by stdin. However, it is also possible to output the transferred data to a temporary file created by openFT. You can detect the name of this file via the variable %TEMPFILE and give it over to the postprocessing as a calling parameter. The postprocessing then can read the data from the specified temporary file and can process it.