I see that in the change log for 4.1.2:
"Raw content of server response can be stored in an external file. (#4517)"
how exactly this can be done?
Indeed with that new patch version, there's an option to write the content of a response into an external file.
To do so, go in the Design section, select the request where you would like to keep the response. Click on the "Advanced" button and then select the "Advanced settings" tab.
From there, you should see an option that you can activate in order to store the response of that request.
Here is a link from our documentation: http://www.neotys.com/documents/doc/neoload/latest/en/html/#963.htm