These remedies apply to the case when you receive some data and you get this warning message:
'visa' unable to read all requested data
ASCII Data
When using the VISA TCP/IP Socket for:
Reading ASCII (text) data using the fscanf,
fgets, or fgetl functions
these are possible causes and remedies:
| Cause | Solution |
|---|---|
The read EOSCharCode is incorrect. | Verify that the EOSCharCode property is set to the
value required by your device. For more information about setting the
property, see EOSCharCode. |
| Communication with the device was interrupted. | Check your device connection. For more information about troubleshooting configuration and connection, see Troubleshooting TCP/IP Communication and Troubleshooting IVI, VISA, and the Quick-Control Interfaces. |
Binary Data
When using the VISA TCP/IP Socket for:
Reading binary data using the fread function
these are possible causes and remedies:
| Cause | Solution |
|---|---|
The number of values to read was not specified and was set to the
InputBufferSize by default. | Set the number of values to read using the Count
property on the fread function, or change the
InputBufferSize property. For more information
about setting the property, see InputBufferSize. For
information about setting number of values to read, see fread. |
| Device did not send all the requested data. | Check your device connection. For more information about troubleshooting configuration and connection, see Troubleshooting TCP/IP Communication and Troubleshooting IVI, VISA, and the Quick-Control Interfaces. |
| There was a data format mismatch. | Verify that the device data format matches the specified read format.
Data format is set using the Precision property. For
more information about supported precisions, see fread. |
Binblock Data
When using the VISA TCP/IP Socket for:
Reading binblock (binary-block) data using the binblockread
function
these are possible causes and remedies:
| Cause | Solution |
|---|---|
| The timeout value might be too short for the amount of data being read. | Increase the Timeout property value. For more
information about setting the property, see Timeout. |
| Communication with the device was interrupted. | Check your device connection. For more information about troubleshooting configuration and connection, see Troubleshooting TCP/IP Communication and Troubleshooting IVI, VISA, and the Quick-Control Interfaces. |
More Troubleshooting Help
For more information about troubleshooting the TCP/IP Socket using VISA interface, including supported platforms, adaptor requirements, configuration and connection, and other troubleshooting tips, see Troubleshooting TCP/IP Communication and Troubleshooting IVI, VISA, and the Quick-Control Interfaces.