Visa close won't return

[TimBotsM]

As requested below in my communication code that generates the warning and the initialisation code

  

[Dennis_Knutson]

That is not code. Those are a couple of small images.

A problem I see in the code and in the trace is the VISA Flush. If you need to call that more than once, there is probably something wrong with the way you are doing a read.

[billko]

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@Ranjeet_Singh wrote:

Before reading and after writing flush the buffer. Try one more thing, Instead of using 16 byte use property node of no of byte available. use some timeout also because by default it is 10sec. hence it will be waiting although it shouldn't. Bit of strange

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Flushing the buffer is generally bad advice.  How do you know the "extra" data is really "extra?"  In all likelihood, it's good data that hasn't been read in correctly.  No, the OP is probably not setting up the I/O correctly.