VISA Read error while transferring points from oscilloscope

[Daacos30]

With the program attached, I am transferring waveform data points from an Oscilloscope to the LabVIEW front panel through numbers and a waveform chart. Everything works fine, but I am getting an error at VISA read: 

"Error - 1073808339 occurred at VISA Read in Test program 4...possible reasons: VISA: timeout expired before operation completed"

I realized that from particular VISA read, I am not reading any data nor is there a return count. Any tips to fix?

[GerdW]

Hi Daacos,

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@Daacos30 wrote:

With the program attached, I am transferring waveform data points from an Oscilloscope to the LabVIEW front panel through numbers and a waveform chart. Everything works fine, but I am getting an error at VISA read: 

"Error - 1073808339 occurred at VISA Read in Test program 4...possible reasons: VISA: timeout expired before operation completed"

I realized that from particular VISA read, I am not reading any data nor is there a return count. Any tips to fix?

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The usual answer to this kind of question is: "Read the manual of your scope (carefully)!"

On your VI:

• right-click the string constants and select "Size to Text".
• right-click the string constants and select "\-code display". You may even make the display mode item visible.

Now read the manual and make sure each command is sent with the (maybe!?) required "end of line" constant

[Daacos30]

Hello there,

I double checked the program and looked at the manual, and everything looks right. The format of commands also seem correct and I tried troubleshooting but nothing solved the error. Any other suggestions?

[RTSLVU]

It looks like you are missing a termination character on the CURVe? command.

Turin on the " '\' Codes Display" and look at your two SCPI command lines.