Command for single sequence mode to save data

Hi,
In my Tektronix TDS 3014 Oscilloscope i have set up single sequence mode. So the Oscilloscope can display the single pulse for any wave. Now when I tried to save this single sequence pulse using Tektronix Labview VI it can not save. I am trying to understand and find the command for single sequence mode for Labview VI which can help me to save the single pulse. I have downloaded Labview VI and used Single channel waveform VI to save waveform of oscilloscope. I can display and save continous waveform using the downloaded VI (as in attached image, sin wave is displayed on front panel). Only issue is to save single pulse as oscilloscope is in single sequence mode. The VI shows error in VISA read when run VI in this mode (attached image). Could you please suggest.
I will really appreciate your suggestion
Thank you.

Hi Sur,

Are you running the VI to get waveform data before or after single shot mode is triggered?
If it's before, then I would expect an error, as there's no data to be sent over. You have to wait until after the trigger happens and the data is fully acquired to be able to transfer it over.

Hi,
I am running the VI to get single sequence waveform data after single shot mode is triggered.
At first, I send single pulse to oscilloscope using function generator when oscilloscope is in single sequence mode. So Oscilloscope display single pulse ( as in attached image). After that I come to VI and run it.

One thing I have noticed in VI,  when I start running VI, it runs at first. And at the same time Oscilloscope display keep on showing single pulse. But when VI reached in Read waveform SubVi it start showing error. At this stage, VI stop by showing error in VISA Read (like in attached image). At the same time when VISA Read shows error, single pulse disappear in oscilloscope. 
Thank you.