Timeout expired before operation completed

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Madeline Kane
Madeline Kane 2023-6-29
移动：Walter Roberson 2024-8-26
Ran in:
g=visadev("GPIB::18::INSTR")
visadevlist and visadev are not supported on Linux.
writeline(g,"Display:Contrast")
data=readline(g)
Hello, I am currently trying to read and write to my PSA spectrum analyzer. visadev is successfully connecting it, but I writeline and readline, when added into my code, always get the "Timeout expired before operation completed" error message. I do not understand why this is not working and how I can fix it. Any advice is greatly apprectiated!
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LO
LO 2024-8-26
移动：Walter Roberson 2024-8-26
I am having the same issue with writing data acquired through a PCIexpress National Instrument acquisition card.
The issue does not occur all the time. Just sometimes...
I am not sure this is a memory issue .
I am using the same scripts and routines as usual, no major changes to the system, HD space is not close to end...I have no idea... thank you for any tip

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回答（2 个）

Adit Kirtani
Adit Kirtani 2023-7-5
Hi Madeline,
From the issue you have described in your question, I have understood that the write operation has not finished within the default time to complete a write operation. You can change this value by using the following code snippet:
timeout_duration = 20 %Change to whatever value you wish
v = visadev( "GPIB::18::INSTR");
v.timeout = timeout_duration
%Now perform your write / read operations
You can view more details regarding the read and write properties of the visadev object using this documentation link:
https://www.mathworks.com/help/instrument/visadev-properties.html
I hope this helps,
Adit Kirtani
Andrei
Andrei 2023-11-22
A couple of suggestions:
See also:
https://www.mathworks.com/help/instrument/visadev.writeread.html
https://www.mathworks.com/help/instrument/visadev-warning-unable-to-read-any-data.html

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