Hello,
 
	I've been trying to follow along with the following Interactive Brokers lessons on IB API:  https://youtu.be/aSdi667LGp0?t=251
 
	The code that I am testing is the exact code from the video and can also be found in the attached PDF. The purpose is to simply print live data tick by tick. The issue I am having is that it works when I run the program... and then it doesn't. When it fails to return live market data, it displays "Process finished with exit code 0" meaning that there were no errors. If the code failed outright it would be easier to troubleshoot but it is very perplexing that it sometimes works and sometimes doesn't. Any help would be appreciated. Any alternate code to test the same concept would also be helpful!
 
	M Fitch
 
	 
 
	System and software details:
 
	Windows 10
 
	TWS stable windows x64
 
	TWS API install 9.76
 
	IntelliJ
 
	 
 
TA-2018-TWS-Python-Receiving-Market-Data-Study-Notes.pdf