LabVIEW crashes the PC in time when it reads Visa serial

Question

Hi, I am new programming in LabVIEW and I need to do a program able to read some parameters from the devices, keep the data in a file, display it in a graph… etc.
From the example “advanced serial write and read” I was able to send the commands to the devices and read it. I also could  manage to save it in a file. The problem is that in time, one hour or so, the PC reboots alone for a problem in the LabVIEW program I have done. Could you please, have a look at it and tell me what could be the possible reason?? 
Any idea of how to improve the structure of the program will be welcome. I try to learn as fast as possible.
Thank you very much attention and patience.
Attachments:
Write and Read_11.vi ‏57 KB

Answer 1

I suspect the Write To Spreadsheet File.vi.  What that VI does is open the file, write your data, and then close it.  It does this with every iteration of your loop.
You will be much better off opening the file before your loop, close it after, and write inside.  You will want to use the Array To Spreadsheet String function to format your data to write it.
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