There is a general configuration of stream handling available.
The stream handling shown in figure 12.5 allows you to specify where standard out and standard error for the external application should be handled.
Basically, you can choose to ignore it, or you can import it using one of the importers available on the server. For some applications, standard out produces the main result, so here it makes sense to choose an appropriate importer. But also for debugging purposes it can be beneficial to import standard out and standard error as text so that you can see it in the Workbench after a run.