Resolve VISA Warning: Unable to Read All Data
Issue
These remedies apply when you receive some data and you get this warning message:
'visadev' unable to read all requested data
Possible Solutions
Try these remedies to resolve the following causes when you use the VISA interface
for reading binary data using the read function.
| Cause | Solution |
|---|---|
| The number of values to read was set to a higher value than the number of values available to be read. | Confirm that you set the correct number of values to read with
the read function. For information about setting
the number of values to read, see read. |
| Device did not send all the requested data or communication with the device was interrupted. | Check your device connection. For more information about troubleshooting configuration and connection, see Troubleshooting VISA Interface. |
| There was a data format mismatch. | Verify that the device data type matches the specified read data
type. Specify the data type with read. For more
information about supported data types, see read. |
| 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. |
