Need Help in Troubleshooting to open a COM Port

[riddhi_shah]

Hello!

I had a question regarding reading value from USB for that I have followed CVI/Sample for rs232 which works individually well, but then combining with my application has issue with opening a COM port. I have attached my application over here, any lead would be highly appreciated. Thanks!

[RobertoBozzolo]

Your code is too complex for anybody to understand the situation, the panel with port settings is not posted (OMEGAUSB) and in 6K+ lines of code only 3 (yes, three!) write/read instructions are present and no Com port opening instruction appears at all

Where are you opening the port and with which parameters? Which problems are you having in doing so? Please add some more detail on your situation and post the actual code that opens the port and any error code you are receiving if you want some concrete help from us!

[riddhi_shah]

Yes Sure, here is some more information in terms of configuration of Parameters for COM Port, Opening a Com port with OpenComConfig command, attaching only a snippet of code and .uir in snippet form. I actually receive RS232 Error -3, which says to me that my port is not open, snippet for that too. Thanks for help!

[RobertoBozzolo]

Try passing an empty string to DeviceName parameter in OpenComConfig (), letting the driver to automatically accommodate the name.

[riddhi_shah]

Thanks for the suggestion, tried passing empty string but before i could confirm, i ran into another FATAL error with a piece of code that I am attaching here, could you suggest why? 

[RobertoBozzolo]

That's not an empty string, is a one-character string with a space embedded!

Note the difference between " " and "". Documentation speaks about a NULL pointer or an empty string to let the driver accommodate device name internally: that's what I have been doing for years now without any problem.