Considering that LoadNinja is a load-testing tool:
a) I am doubting that this is at all possible;
b) Can you provide more details about your use-case and why do you need to store something from the load test to external file?
Suppose i want to capture booking id of the tickets and store it in output file.Is it possible?
Do we have any solutions for this?
Documentation keeps mum as for outputting something to external file, so I am pretty sure this is not possible at the moment.
For official answer you may contact Support via the https://support.smartbear.com/message/?prod=LoadNinja form.
Users have the possibility to download report data to a file in csv format.
From the test run, click Download Report and select CSV.
This is described in Download results section of: