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CSV file between Python and Labview

Hi all, may I know is there any method to solve this issue ? 
My project is object sorting. 

Object coordinates obtained from Labview and stored in CSV file. 
Python reads the values from CSV file and proceeds with robot sorting. 

My issue is about I would like to check whether is there any object on the workspace 1st before proceeding to object sorting. 

If there's no object, then it will keep overwriting the CSV file until object is detected. 

If there's one object coordinates obtained, it will proceed sorting. 

I did face another issue is if 2 objects are detected with 2 sets of coordinates, the python node will shut down directly. 

May i know how to set the condition like after the 1st object is sorted, then will proceed to 2nd object ? 

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Is the code returning any error when the Python node is shutting down?

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Message 2 of 4
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Yes. 
When the python code is not running, there's error from LabVIEW.

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Can you share with us the details of the error?

Also, a screenshot can be helpful too!

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