Tektronix MSO56 Image Acquire

Hello,

Currently I'm trying to acquire oscilloscope image by LabVIEW for oscilloscope Tektronix MSO56.

After sending the save image & file system commands, it can work to capture the image.

However, after that, the oscilloscope will not give any response to other commands (including *IDN?) until restart the oscilloscope. 

Anyway, by manually pressing the oscilloscope works perfectly, just remote access is failed.

Attached you can see the LabVIEW VI.

Basically, there are 2 parts commands in the VI:

1^st, invert the color of image, and save image in pre-set folder (use “:SAVE:IMAGE” command group).

2^nd, read file from the pre-set folder (use “:FILESYSTEM” command group).

Need help on how to improve on this VI? 

Did I miss out anything to end the communication between VISA and equipment?