check the simulation log to see of CST finished all the 200 simulations or terminated after 50 only

I checked, whole parameter sweep was run and all of 2000 simulations were successfully completed according to the simulation log.

I have had this problem before too. It always happens like this i.e. you run a parameter sweep for 100+ simulations but only 50 curves / simulation results are visible in S-parameters.

I have a feeling that rest of the results are there, but there is a certain specific way to view them and i don't know about it.

i haven't met such a problem so far but i'd suggest two things

1-try making a new folder in the 1D results and copy the s11 file to it , you'd have separate files for each plot, all the results should be there

2- if that didn't work try exporting the results into ascii file that can be read through matlab for example

I already worked on your first suggestion. The second picture is from the new folder in the 1D results. I copied the whole S1,1 file to this new folder. But as you can see only first 50 curves were copied.

click on your picture to select the S parameters (S11 forexample) you want to save, the hit Ctrl+C, then open a file editor able to handle big files, and finally hit Ctrl+V to copy the values in the file. Save your file. Do this again for the other parameters. This saves the values of the parameters in columns such as freq, real part, imaginary part, with some information about the case. But this information is sometimes very short, and correspondance with the  sweep is not evident. You should also save the log file of your sweep to make this correspondance easier.

Its one way to look at all the results. But if i have 2000 curves, it would take a lot of time to go through all the data.

So i have decided to go with parameter sweeps with less number of simulations. Life gets easier if we keep things simple :)

From the "1D plot" tab, increase the number of curves.